A STAR-STUDDED HOLIDAY MUSICAL EVENT -- The 90-minute iHeartRadio Jingle Ball celebrates the holiday season with a spectacular music event featuring performances by the year's biggest recording artists. The star-studded concert event will feature performances from Shawn Mendes, Cardi B, Camilla Cabello and many more of today's biggest stars. Original airdate 12/16/2018.

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NEW YORK - DECEMBER 7: Khalid performs onstage during the 2018 iHeart Radio Jingle Ball at Madison Square Garden on December 7, 2018 in New York City. (Photo by Todd Owyoung for iHeartMedia)

A STAR-STUDDED HOLIDAY MUSICAL EVENT -- The 90-minute iHeartRadio Jingle Ball celebrates the holiday season with a spectacular music event featuring performances by the year's biggest recording artists. The star-studded concert event will feature performances from Shawn Mendes, Cardi B, Camilla Cabello and many more of today's biggest stars. Original airdate 12/16/2018.

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NEW YORK - DECEMBER 7: Dua Lipa performs onstage during the 2018 iHeart Radio Jingle Ball at Madison Square Garden on December 7, 2018 in New York City. (Photo by Todd Owyoung for iHeartMedia)

A STAR-STUDDED HOLIDAY MUSICAL EVENT -- The 90-minute iHeartRadio Jingle Ball celebrates the holiday season with a spectacular music event featuring performances by the year's biggest recording artists. The star-studded concert event will feature performances from Shawn Mendes, Cardi B, Camilla Cabello and many more of today's biggest stars. Original airdate 12/16/2018.

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NEW YORK - DECEMBER 7: Camila Cabello performs onstage during the 2018 iHeart Radio Jingle Ball at Madison Square Garden on December 7, 2018 in New York City. (Photo by Todd Owyoung for iHeartMedia)

A STAR-STUDDED HOLIDAY MUSICAL EVENT -- The 90-minute iHeartRadio Jingle Ball celebrates the holiday season with a spectacular music event featuring performances by the year's biggest recording artists. The star-studded concert event will feature performances from Shawn Mendes, Cardi B, Camilla Cabello and many more of today's biggest stars. Original airdate 12/16/2018.

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NEW YORK - DECEMBER 7: Bebe Rexha performs onstage during the 2018 iHeart Radio Jingle Ball at Madison Square Garden on December 7, 2018 in New York City. (Photo by Todd Owyoung for iHeartMedia)

A STAR-STUDDED HOLIDAY MUSICAL EVENT -- The 90-minute iHeartRadio Jingle Ball celebrates the holiday season with a spectacular music event featuring performances by the year's biggest recording artists. The star-studded concert event will feature performances from Shawn Mendes, Cardi B, Camilla Cabello and many more of today's biggest stars. Original airdate 12/16/2018.

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NEW YORK - DECEMBER 7: Alessia Cara performs onstage during the 2018 iHeart Radio Jingle Ball at Madison Square Garden on December 7, 2018 in New York City. (Photo by Brian Friedman for iHeartMedia)

A STAR-STUDDED HOLIDAY MUSICAL EVENT -- The 90-minute iHeartRadio Jingle Ball celebrates the holiday season with a spectacular music event featuring performances by the year's biggest recording artists. The star-studded concert event will feature performances from Shawn Mendes, Cardi B, Camilla Cabello and many more of today's biggest stars. Original airdate 12/16/2018.

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NEW YORK - DECEMBER 7: Meghan Trainor performs onstage during the 2018 iHeart Radio Jingle Ball at Madison Square Garden on December 7, 2018 in New York City. (Photo by Brian Friedman for iHeartMedia)

A STAR-STUDDED HOLIDAY MUSICAL EVENT -- The 90-minute iHeartRadio Jingle Ball celebrates the holiday season with a spectacular music event featuring performances by the year's biggest recording artists. The star-studded concert event will feature performances from Shawn Mendes, Cardi B, Camilla Cabello and many more of today's biggest stars. Original airdate 12/16/2018.

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NEW YORK - DECEMBER 7: Shawn Mendes performs onstage during the 2018 iHeart Radio Jingle Ball at Madison Square Garden on December 7, 2018 in New York City. (Photo by Brian Friedman for iHeartMedia)

NIGHT TWO OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Panic! At the Disco, Mariah Carey, Shawn Mendes, Kygo, and many more. Original airdate 10/8/2018.

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LAS VEGAS, NV - SEPTEMBER 22: Justin Timberlake performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 22, 2018 in Las Vegas, Nevada. (Photo by Brian Friedman for iHeartMedia)

NIGHT TWO OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Panic! At the Disco, Mariah Carey, Shawn Mendes, Kygo, and many more. Original airdate 10/8/2018.

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LAS VEGAS, NV - SEPTEMBER 22: Shawn Mendes performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 22, 2018 in Las Vegas, Nevada. (Photo by Todd Owyoung for iHeartMedia)

NIGHT TWO OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Panic! At the Disco, Mariah Carey, Shawn Mendes, Kygo, and many more. Original airdate 10/8/2018.

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LAS VEGAS, NV - SEPTEMBER 22: Luke Bryan performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 22, 2018 in Las Vegas, Nevada. (Photo by Todd Owyoung for iHeartMedia)

NIGHT ONE OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Kelly Clarkson, Justin Timberlake, Carrie Underwood, Imagine Dragons, and many more. Original airdate 10/7/2018.

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LAS VEGAS, NV - SEPTEMBER 21: Mariah Carey performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 21, 2018 in Las Vegas, Nevada. (Photo by Todd Owyoung for iHeartMedia)

NIGHT TWO OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Panic! At the Disco, Mariah Carey, Shawn Mendes, Kygo, and many more. Original airdate 10/8/2018.

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LAS VEGAS, NV - SEPTEMBER 22: Carrie Underwood performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 22, 2018 in Las Vegas, Nevada. (Photo by Todd Owyoung for iHeartMedia)

NIGHT ONE OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Kelly Clarkson, Justin Timberlake, Carrie Underwood, Imagine Dragons, and many more. Original airdate 10/7/2018.

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LAS VEGAS, NV - SEPTEMBER 21: Jason Aldean performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 21, 2018 in Las Vegas, Nevada. (Photo by Greg Noire for iHeartMedia)

NIGHT TWO OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Panic! At the Disco, Mariah Carey, Shawn Mendes, Kygo, and many more. Original airdate 10/8/2018.

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LAS VEGAS, NV - SEPTEMBER 22: Dan Reynolds of Imagine Dragons performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 22, 2018 in Las Vegas, Nevada. (Photo by Greg Noire for iHeartMedia)

NIGHT ONE OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Kelly Clarkson, Justin Timberlake, Carrie Underwood, Imagine Dragons, and many more. Original airdate 10/7/2018.

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LAS VEGAS, NV - SEPTEMBER 21: Kygo performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 21, 2018 in Las Vegas, Nevada. (Photo by Brian Friedman for iHeartMedia)

NIGHT ONE OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Kelly Clarkson, Justin Timberlake, Carrie Underwood, Imagine Dragons, and many more. Original airdate 10/7/2018.

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LAS VEGAS, NV - SEPTEMBER 21: Panic! at the Disco performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 21, 2018 in Las Vegas, Nevada. (Photo by Brian Friedman for iHeartMedia)

NIGHT TWO OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Panic! At the Disco, Mariah Carey, Shawn Mendes, Kygo, and many more. Original airdate 10/8/2018.

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LAS VEGAS, NV - SEPTEMBER 22: Lynyrd Skynyrd performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 22, 2018 in Las Vegas, Nevada. (Photo by Brian Friedman for iHeartMedia)

NIGHT TWO OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Panic! At the Disco, Mariah Carey, Shawn Mendes, Kygo, and many more. Original airdate 10/8/2018.

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LAS VEGAS, NV - SEPTEMBER 22: Justin Timberlake performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 22, 2018 in Las Vegas, Nevada. (Photo by Brian Friedman for iHeartMedia)

NIGHT TWO OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Panic! At the Disco, Mariah Carey, Shawn Mendes, Kygo, and many more. Original airdate 10/8/2018.

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LAS VEGAS, NV - SEPTEMBER 22: Logic performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 22, 2018 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images for iHeartMedia)

NIGHT TWO OF A TWO PART EPIC LAS VEGAS EVENT -- The legendary concert event, filmed over two nights at Las Vegas' T-Mobile Arena, features performances by some of the biggest names in the music industry. Hosted by Ryan Seacrest ("On Air with Ryan Seacrest"), the iconic lineup of musical acts scheduled to perform includes Panic! At the Disco, Mariah Carey, Shawn Mendes, Kygo, and many more. Original airdate 10/8/2018.

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LAS VEGAS, NV - SEPTEMBER 22: Kelly Clarkson performs onstage during the 2018 iHeartRadio Music Festival at T-Mobile Arena on September 22, 2018 in Las Vegas, Nevada. (Photo by Rich Fury/Getty Images for iHeartMedia)