The singer performs at the 2015 Y100 Jingle Ball at BB&T Center in Sunrise, Florida.
The singer opts for a sexy black look at the iHeartRadio Z100 Jingle Ball in NYC.
The singer sports another sexy black look onstage.
The singer was gorgeous in white when she walked the red carpet.
The actress and new pop singer sparkles in crimson.
Someone's not Team Pepsi...
The singer gives off a rock star vibe.
The actress sparkles at the iHeartRadio Z100 Jingle Ball in NYC.
The actress went for gothic glamour in a lace Oglia-Loro dress.
The Modern Family star appears at the iHeartRadio Z100 Jingle Ball in NYC.
The "Same Old Love" singer strikes a sultry pose.
Niall Horan, Harry Styles, Louis Tomlinson and Liam Payne strike sexy poses backstage.
The singer performs at 102.7 KIIS FM's Jingle Ball 2015, presented by Capital One, at Staples Center in Los Angeles.
Before showtime, The Bachelor and Bachelorette host enjoys some tasty Girl Scout cookies.
Before his performance on the Jingle Ball stage, the world-famous DJ rocks out to Guitar Hero Live.
When Real Housewives collide! The Bravo stars meet up at 102.7 KIISFM's Jingle Ball gifting suite.
The One Direction singers gives us a smile!
The actress-turned-singer performs at L.A.'s Jingle Ball.
The One Direction star and his hair perform at L.A.'s Jingle Ball.
Cute couple alert! The Hollywood pair enjoys a little shopping before enjoying One Direction, Selena Gomez and more artists perform.
"So FREAKING AWESOME meeting the beautiful @elliegoulding in the Mercedes Benz meet and greet room tonight!" the former Bachelor star wrote on Instagram. "Thank you for being so sweet!"