When: September 2008 - July 2009
Rumor had it that actress Camilla Belle was the reason Joe and Taylor Swift broke up. Rumor also had it that Camilla was unfaithful to Joe with Robert Pattinson and her ex-boyfriend, tennis player Fernando Verdasco. As the wheels were falling off, Joe reportedly started crying during a Jonas Brothers concert and changed the lyrics of a song from "Get a rep for breakin' hearts / Now I'm done with superstars" to "Get a rep for breakin' hearts, now I'm done with movie stars." Total Taylor swift move!
Smash probability: Another rumor had it that Camilla pulled the ripcord because she just couldn't take celibacy anymore. How this one lasted six months (or longer) is beyond us.