Zac Efron is Shirtless! Shirtless! Shirtless!

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.

Girlfriend Vanessa Hudgens was not far behind showing off some leopard-print undergarment. Zac was also seen wearing a Wildcats (ROAR!) basketball uniform, carrying a Nordstrom shopping bag and a stick (presumably for stick ball).

Per usual, Zanessa was spotted holding hands. Everybody now… Awww!

Also finally spotted on set: Corbin Bleu!

20+ pictures inside of shirtless Zac Efron and some more HSM3 cast members…