Singer Sam Smith attends the Z100's iHeartRadio Jingle Ball 2017 at Madison Square Garden on December 8, 2017 in New York City.
Niall Horan attends the 2017 WiLD 94.9 FM iHeartRadio Jingle Ball at SAP Center on November 30, 2017 in San Jose, California.
Katie Holmes and Suri Cruise perform during the 2017 Z100 Jingle Ball at Madison Square Garden on December 8, 2017 in New York City.
Katie Holmes and Suri Cruise perform during the 2017 Z100 Jingle Ball at Madison Square Garden on December 8, 2017 in New York City.
Taylor Swift performs during the 2017 Z100 Jingle Ball at Madison Square Garden on December 8, 2017 in New York City.
Demi Lovato performs at the Z100's iHeartRadio Jingle Ball 2017 at Madison Square Garden on December 7, 2017 in New York. / AFP PHOTO / ANGELA WEISS
Demi Lovato performs at the Z100's iHeartRadio Jingle Ball 2017 at Madison Square Garden on December 7, 2017 in New York. / AFP PHOTO / ANGELA WEISS
Charlie Puth performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Demi Lovato performs on stage at 103.5 KISS FM's iHeartRadio Jingle Ball 2017 on December 13, 2017 in Chicago, Illinois.
Demi Lovato performs at 103.5 KISS FM's iHeartRadio Jingle Ball 2017 on December 13, 2017 in Rosemont, Illinois.
Demi Lovato performs at 103.5 KISS FM's iHeartRadio Jingle Ball 2017 on December 13, 2017 in Rosemont, Illinois.
Demi Lovato performs at 103.5 KISS FM's iHeartRadio Jingle Ball 2017 on December 13, 2017 in Rosemont, Illinois.
Demi Lovato performs at 103.5 KISS FM's iHeartRadio Jingle Ball 2017 on December 13, 2017 in Rosemont, Illinois.
Demi Lovato performs at 103.5 KISS FM's iHeartRadio Jingle Ball 2017 on December 13, 2017 in Rosemont, Illinois.
Demi Lovato performs at 103.5 KISS FM's iHeartRadio Jingle Ball 2017 on December 13, 2017 in Rosemont, Illinois.
Demi Lovato attends 103.5 KISS FM's iHeartRadio Jingle Ball 2017 on December 13, 2017 in Chicago, Illinois.
Demi Lovato attends 103.5 KISS FM's iHeartRadio Jingle Ball 2017 on December 13, 2017 in Chicago, Illinois.
Charlie Puth performs at the Hot 99.5 iHeartRadio Jingle Ball 2017 at Capital One Arena on December 11, 2017 in Washington, DC.
Hip hop artist Cardi B attends the 2017 iHeartRadio Canada Jingle Ball at the Air Canada Centre on December 9, 2017 in Toronto, Canada.
Artist Cardi B performs on stage during the 2017 iHeartRadio Canada Jingle Ball at the Air Canada Centre on December 9, 2017 in Toronto, Canada.
Artist Cardi B performs on stage during the 2017 iHeartRadio Canada Jingle Ball at the Air Canada Centre on December 9, 2017 in Toronto, Canada.
Artist Cardi B performs on stage during the 2017 iHeartRadio Canada Jingle Ball at the Air Canada Centre on December 9, 2017 in Toronto, Canada.
Artist Cardi B performs on stage during the 2017 iHeartRadio Canada Jingle Ball at the Air Canada Centre on December 9, 2017 in Toronto, Canada.
Artist Cardi B performs on stage during the 2017 iHeartRadio Canada Jingle Ball at the Air Canada Centre on December 9, 2017 in Toronto, Canada.
Hip hop artist Cardi B attends the 2017 iHeartRadio Canada Jingle Ball at the Air Canada Centre on December 9, 2017 in Toronto, Canada.
Daniel Seavey, Corbyn Besson, Jack Avery, Zach Herron and Jonah Marais of Why Don't We perform during the 2017 Z100 Jingle Ball at Madison Square...
Logic performs during the 2017 Z100 Jingle Ball at Madison Square Garden on December 8, 2017 in New York City.
Sam Smith performs during the 2017 Z100 Jingle Ball at Madison Square Garden on December 8, 2017 in New York City.
Rapper Logic attends the Z100's iHeartRadio Jingle Ball 2017 at Madison Square Garden on December 8, 2017 in New York City.
Singer/songwriter Demi Lovato attends the Z100's iHeartRadio Jingle Ball 2017 at Madison Square Garden on December 8, 2017 in New York City.
Musician Lauv attends the Z100's iHeartRadio Jingle Ball 2017 at Madison Square Garden on December 8, 2017 in New York City.
The Chainsmokers with Halsey perform at the Z100's iHeartRadio Jingle Ball 2017 at Madison Square Garden on December 7, 2017 in New York. / AFP PHOTO...
Halsey performs at the Z100's iHeartRadio Jingle Ball 2017 at Madison Square Garden on December 7, 2017 in New York. / AFP PHOTO / ANGELA WEISS
Sam Smith performs at the Z100's iHeartRadio Jingle Ball 2017 at Madison Square Garden on December 7, 2017 in New York. / AFP PHOTO / ANGELA WEISS
Demi Lovato performs during the 2017 Z100 Jingle Ball at Madison Square Garden on December 8, 2017 in New York City.
Rita Ora and Absolut Open Mic Project inspire acceptance through music at exclusive performance during 2017 iHeartRadio Jingle Ball Tour at...
Hailee Steinfeld performs during the 2017 WiLD 94.9 FM iHeartRadio Jingle Ball at SAP Center on November 30, 2017 in San Jose, California.
Demi Lovato performs during the 2017 WiLD 94.9 FM iHeartRadio Jingle Ball at SAP Center on November 30, 2017 in San Jose, California.
Niall Horan attends the 2017 WiLD 94.9 FM iHeartRadio Jingle Ball at SAP Center on November 30, 2017 in San Jose, California.
Logic performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Logic performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Logic performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
General view of stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Fifth Harmony performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Fifth Harmony performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Fifth Harmony performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Nick Jonas arrives at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Why Don't We arrives at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Demi Lovato performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Demi Lovato performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Nick Jonas arrives at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Demi Lovato performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Demi Lovato performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Halsey performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Nick Jonas arrives at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Halsey performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Why Don't We arrives at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Demi Lovato performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Liam Payne performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.
Halsey performs on stage at the IHeartRadio Jingle Ball 2017 at BB&T Center on December 17, 2017 in Sunrise, Florida.