1/10
Isaac Brekken/Getty Images for iHeartMedia
Kelly Clarkson
The singer performs on stage.
2/10
Isaac Brekken/Getty Images for iHeartMedia
Nicki Minaj
The hip-hop star shows the crowd some love!
3/10
Isaac Brekken/Getty Images for iHeartMedia
Nick Jonas
The "Jealous" singer performs on stage.
4/10
Isaac Brekken/Getty Images for iHeartMedia
Adam Lambert
The glam rocker and American Idol alum performs on stage.
5/10
Ethan Miller/Getty Images for iHeartMedia
Adam Lambert
The singer shows a suave look.
6/10
Ethan Miller/Getty Images for iHeartMedia
Katharine McPhee
The Scorpion star and Smash and American Idol alum shows a chic look.
7/10
Ethan Miller/Getty Images for iHeartMedia
Tyson Beckford
The model gives his best smoldering look.
8/10
Ethan Miller/Getty Images for iHeartMedia
Nick Jonas
The pop star strikes a handsome pose.
9/10
Ethan Miller/Getty Images for iHeartMedia
Holly Madison
The former Playboy Playmate and Girls Next Door alum showcases a lovely floral look.
10/10
David Becker/Getty Images for iHeartMedia
Kelly Clarkson
The singer appears backstage.