hair Vanessa Hudgens Austin Butler hat sunglasses jeans sweats

Why are you hiding that beautiful face, Vanessa?

Ms. Hudgens and her sexy beau Austin Butler hit up Trader Joe's in Studio City, and they seemed awfully camera shy. Way to stay under the radar ... ducking while wearing baseball caps.

Oh, to be young and rich ... while trying to pretend that you don't want to be photographed!