Vanessa Hudgens -- My Ass is Small But I Twerk Like It's BIG



What's good for the Miley is good for Vanessa Hudgens -- and GREAT for us to watch ... because the former Disney star opened up her own twerking clinic last night.

Vanessa performed with her new girl group YLA at Bootsy Bellows -- doing some singing, some dancing ... and then tried like Hell to shake her ass right out of her booty shorts when the DJ dropped "Bubble Butt."


Here's the thing ... Miley Cyrus caught major flack for displaying a lack of back during her VMA twerkfest. Does Vanessa's ass action deserve the same reaction ... or does it get a pass?


Discuss.