When: March 2010 - May 2010

Camp Rock co-stars Joe and Demi definitely dated: Demi confirmed on March 12, 2010 that they were an item. But on May 24th, Demi, who was on the verge of checking into a rehab facility for "physical and emotional issues," tweeted that they'd broken up. Later, Joe would tell Us Weekly that it was his decision to break up with her after realizing he cared more about her as a friend.

Smash probability: Judging by Joe's statement, we wouldn't be surprised if he felt too brotherly towards her to get physical.