Zac Efron with Vanessa Hudgens

Zac Efron and Vanessa Hudgens have reportedly been playing nice since announcing their shocking break up about a month ago, and that will be put to the test tonight as both star compete for the Favorite Star Under 25 award at the People's Choice Awards.

These two are going up against Emma Watson, Robert Pattinson, and Kristen Stewart in the category, so there's a chance neither will make it up on stage tonight, but you never know. Hopefully they'll be nothing put polite if either takes home a trophy.

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.