Katy Perry, Usher Rock Kids' Presidential Inaugural Concert

Billboard
Kelly Clarkson is a multiple nominee at next month's Grammy Awards, but what she's really excited about is another event where she'll be joined by Beyonce, Katy Perry, Stevie Wonder, Alicia Keys, ...

Usher, Katy Perry, 'Glee' cast join Michelle Obama ...
The Canadian Press
WASHINGTON - Usher sang "Yeah!" Katy Perry donned star and stripes for "Firework." And a ballroom full of lucky kids got to rock out with Sasha and Malia Obama at Saturday's Kids' Inaugural Concert, a ...