Zac Efron and Vanessa Hudgens

These two dated for about 5 years before calling it quits recently, and we're guessing they won't be sitting next to each other tonight as probably originally planned.

Who will be sitting next to each other at tonight's big show? None other than rumored couple Robert Pattinson and Kristen Stewart! Apparently they'll be sitting front and center together for just an hour , then Robert has to get back to Louisiana to film the last installment of the Twilight saga.