Katy Perry, Usher Play Kids' Inaugural Concert (VIDEO)

Usher and Katy Perry played their hits to a crowd of youngsters at the Kids' Inaugural Concert on Saturday in Washington, D.C. The event honored America's military families and was hosted by first lady Michelle Obama and the vice president's wife Jill Biden. First kids Sasha and Malia Obama were also present for the event.

In addition to Usher and Perry, the concert, held at Washington Convention Center, also included Mindless Behavior, Far East Movement and the cast of FOX's hit Glee, while Nick Cannon emceed the evening. Usher performed "Yeah!," "Without You" "OMG," while Perry, dressed in stars and stripes, performed "Teenage Dream," "Part of Me," "Wide Awake" and crowd favorite "Firework."