• BEACHY KEEN photo | Ashley Tisdale, Zac Efron

Credit: MC/AKM

Published: Tuesday July 05, 2011 06:00 AM EDT

2011

BEACHY KEEN

That's hot! A buff (and shirtless!) Zac Efron helps pal Ashley Tisdale celebrate her 26th birthday beachside on Saturday in Malibu, Calif.