Singer Mariah Carey backstage at Z100's Z-Day: New York City's 100th Birthday Blast at Radio City Music Hall.
Usher and Justin Bieber perform onstage during Z100's Jingle Ball 2009 at Madison Square Garden on December 11, 2009 in New York City.
Singer Lady GaGa performs on stage during Z100's Jingle Ball at Madison Square Garden on December 12, 2008 in New York City.
Justin Bieber and Ed Sheeran attend backstage at Z100's Jingle Ball 2012, presented by Aeropostale, at Madison Square Garden on December 7, 2012 in...
American singer, songwriter and actress Cyndi Lauper, wearing a sheer outfit, attends the Z-100 Concert Party, held at the Palladium in the East...
Taylor Swift performs onstage during Z100's Jingle Ball 2009 at Madison Square Garden on December 11, 2009 in New York City.
Selena Gomez performs onstage during Z100's Jingle Ball 2013, presented by Aeropostale Madison Square Garden on December 13, 2013 in New York City.
Taylor Swift and Ed Sheeran attend Z100's Jingle Ball 2012, presented by Aeropostale, at Madison Square Garden on December 7, 2012 in New York City.
Jennifer Lopez during Z100s Jingle Ball 2003 - Show at Madison Square Garden in New York City, New York, United States.
Beyonce Knowles during Z100's Jingle Ball 2002 - Show at Madison Square Garden in New York City, New York, United States.
Madison Beer attends Z100's Jingle Ball 2018 at Madison Square Garden on December 07, 2018 in New York City.
Sam Smith performs onstage during Z100's iHeartRadio Jingle Ball 2017 at Madison Square Garden on December 8, 2017 in New York City.
Katy Perry performs on stage during Z100's Jingle Ball 2008 Presented by H&M at Madison Square Garden on December 12, 2008 in New York City.
Joe Jonas of Jonas Brothers performs onstage during Z100's Zootopia at the IZOD Center on May 17, 2008 in East Rutherford, New Jersey.
Jonas Brothers attends Z100's Jingle Ball artist gift lounge at Madison Square Garden on December 14, 2007 in New York City.
Musician Justin Bieber performs onstage during Z100's Jingle Ball 2016 at Madison Square Garden on December 9, 2016 in New York, New York.
Selena Gomez performs onstage during Z100's Jingle Ball 2015 at Madison Square Garden on December 11, 2015 in New York City.
Tove Lo performs onstage during Z100's Jingle Ball 2015 at Madison Square Garden on December 11, 2015 in New York City.
Singers Charlie Puth and Selen Gomez attend Z100's Jingle Ball 2015 at Madison Square Garden on December 11, 2015 in New York City.
Taylor Swift performs during Z100's Jingle Ball 2012 presented by Aeropostale at Madison Square Garden on December 7, 2012 in New York City.
Justin Bieber performs onstage during Z100's Jingle Ball 2012, presented by Aeropostale, at Madison Square Garden on December 7, 2012 in New York...
Ed Sheeran performs onstage during Z100's Jingle Ball 2012, presented by Aeropostale, at Madison Square Garden on December 7, 2012 in New York City.
Harry Styles of One Direction performs onstage during Z100's Jingle Ball 2012, presented by Aeropostale, at Madison Square Garden on December 7, 2012...
Beyonce Knowles during Z100s Jingle Ball 2003 - Show at Madison Square Garden in New York City, New York, United States.
Singers A.J. Mclean, Howie Dorough, Nick Carter and Brian Littrell of Backstreet Boys pose for a photo in the press room during Z100's Jingle Ball...
Devonte and Tango Metro during Z100's Zootopia 2003 - Press Room at Giants Stadium in East Rutherford, New Jersey, United States.
Brad Arnold, of "3 Doors Down" during Z100's Jingle Ball 2003 - Artist Gift Lounge by On 3 Productions at Madison Square Garden in New York City, New...
Shawn Mendes performs onstage during Z100's Jingle Ball 2018 at Madison Square Garden on December 07, 2018 in New York City.
Katy Perry attends Z100's Jingle Ball 2010 presented by H&M at Madison Square Garden on December 10, 2010 in New York City.
Cardi B performs at Z100's Jingle Ball 2018 at Madison Square Garden on December 7, 2018 in New York City.
Khalid and Normani perform at Z100's Jingle Ball 2018 at Madison Square Garden on December 7, 2018 in New York City.
Dua Lipa and Bebe Rexha pose at Z100's Jingle Ball 2018 at Madison Square Garden on December 7, 2018 in New York City.
Sabrina Carpenter performs at Z100's Jingle Ball 2018 at Madison Square Garden on December 7, 2018 in New York City.
Actor/comedian Jack McBrayer attends Z100's Jingle Ball 2008 Artist Gift Lounge By On 3 Productions at Madison Square Garden on December 12, 2008 in...
Jay Sean performs onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
Singer Justin Bieber attends the Z100's Jingle Ball 2009 - Official H&M Artist Gift Lounge Produced by On 3 Productions at Madison Square Garden on...
Jordin Sparks and Justin Bieber performs onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New...
Actress and singer Miranda Cosgrove attends Z100's Jingle Ball 2009 at Madison Square Garden on December 11, 2009 in New York City.
Actress and singer Miranda Cosgrove attends Z100's Jingle Ball 2009 at Madison Square Garden on December 11, 2009 in New York City.
Dancer Maksim Chmerkovskiy attends the Z100's Jingle Ball 2009 - Official H&M Artist Gift Lounge Produced by On 3 Productions at Madison Square...
Taylor Swift performs onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
General view of atmosphere during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
Taylor Swift performs onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
John Mayer performs onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
Orianthi performs onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
John Mayer performs onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
Actress Shailene Woodley attends the Z100's Jingle Ball 2009 - Official H&M Artist Gift Lounge Produced by On 3 Productions at Madison Square Garden...
Taylor Swift performs onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
John Mayer and Taylor Swift performs onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New...
Justin Bieber performs onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
Taylor Swift performs onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
John Mayer and Justin Bieber attends Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
Usher and Justin Bieber perform onstage during Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York...
Usher, Taylor Swift and Justin Bieber attends Z100's Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City.
