Can you believe that this cutie's first love broke his heart for the first time? Justin Bieber belts it, live from the 2010 KCAs.

"Sparks fly! It's like electricity!" Miranda Cosgrove hits an emotional high note in her 2010 KCA performance of "Kissin You."

The Kids' Choice Awards crowd totally hearts Nick star Miranda Cosgrove, aka iCarly's Carly Shay.

Miranda Cosgrove pours her heart out in a dress inspired by the work of legendary New York City street artist Keith Haring.

"No fear, and while you getting your cry on, I'm getting my fly on." Rihanna looks just as "Hard" as her lyrics while performing.

Doing a medley of her recent radio hits in a military-inspired outfit, Rihanna is a straight-up unstoppable stunner.

Rihanna performs "Hard," "Rude Boy" and "Please Don't Stop The Music," live from the 2010 Kids' Choice Awards.

The Bieb is the bomb! Justin Bieber brings the house down with a performance of his radio ruling Usher collab, "Baby."

Yo peace, seeya later! The Bieb brings his show-stopping KCA performance to a close and the crowd goes wild.

iCarly star and 2010 KCA nominee Miranda Cosgrove performs her hit single "Kissin U" for the Orange Carpet crowd.