Zac Efron & Ashley Tisdale - Kids' Choice Awards 2012

Zac Efron poses backstage at the 2012 Kids Choice Awards held at the USC Galen Center in Los Angeles on Saturday afternoon (March 31).

The 24-year-old actor took to the stage during the show to present the award for Favorite TV Show with Keke Palmer. Zac unbuttoned his shirt to reveal the winner – Victorious – plastered on his undershirt.

Also pictured inside: Zac‘s High School Musical co-star Ashley Tisdale, who wore a Kymerah dress, Le Vian earrings, a Hellmuth ring, B by Brian Atwood shoes, and an Edie Parker clutch.

10+ pictures inside of Zac Efron and Ashley Tisdale at the Kids’ Choice Awards…