Zanessa's Saturday Sing-a-long

Zac Efron and Vanessa Hudgens are hard at work on the Utah set of High School Musical 3: Senior Year on Saturday.

Talk about overtime–they’re working weekends!

Ashley Tisdale was also seen on set carrying around her pet pooch, Maui, and a Louis Vuitton dog carrier.

The Kenny Ortega-directed film has a tentative nationwide release date of Friday, October 24.

10+ pictures inside of Zanessa‘s Saturday Sing-a-long…