Zac and Vanessa are Dunzo?

This song from High School Musical 2 sounds like a perfect reel break-up song but who knew that it would actually happen in real life? E! Online reports that the High School Musical sweethearts have split! Sources tell E! that there's no third party involved and that the relationship simply ran its course. Zac and Vanessa met and fell in love on the set of Disney's High School Musical. They were dating for around 4 years already.