Shirtless Zac Efron in High School Musical 3

Zac Efron shows off his washboard abs in a shirtless moment on the set of High School Musical 3 at a top secret location in Utah on Friday.

How to be a shirtless hunk teen idol like him?

Zac was also seen wearing a Wildcats (ROAR!) basketball uniformcarrying a Nordstrom shopping bag and a stick (presumably for stick ball).