You may know Vanessa Hudgens from Disney's High School Musical -- but this actress is now all grown up and taking on films like Gimme Shelter. A film where she stars as a pregnant teenager who flees her abusive mother in search for her Wall Street father.

"I lived in a homeless shelter (for pregnant teens) two weeks before we started shooting." Vanessa tells us, in preparation for this new movie.

Last time her High School Musical co-star, Ashley Tisdale, stopped by Sway in the Morning, she popped her booty and twerked for us.

Vanessa then "throws it back" to Ashley with her counter booty-pop. Who do you think is better? Watch below! Plus, enjoy her uncomfortable sex answers from Sway's Mystery Sack!

Gimme Shelter is in theaters now.

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Vanessa Hudgens Booty Pops on Sway In The Morning & Answers Sex Questions from Sway's Mystery Sack | Sway's Universe
https://www.youtube.com/watch?v=HqZ6i1-vxts

Sway’s Universe
https://www.youtube.com/UCuS96jkLKpTaGB_OWnwZV_A