Vanessa Hudgens just played a prank on Zac Efron that some might consider to be funny, but it's also a little psycho.
According to Life & Style, Vanessa was recently egged on by her friends to see how loyal Zach was. So she sent in a hot girlfriend of hers to talk to him at the gym.
When the girl started talking to him, he didn't flirt back. Vanessa friends say he's only got eyes for her.
Well that's one way of finding out if your boyfriend is being sleazy behind your back. But there's such a thing called trust that also works. Zach's never given Vanessa anything to worry about, so those kinds of games seem a little childish.