She cheated on him with her singer ex.

This girlfriend of the former A+ list tweener actor turned drug troubled B+ list mostly movie actor cheated on him with her singer ex.

Apparently the ex had no idea she was seeing anyone and posted photos of the couple together which he had to take down when she started screaming at him on the phone about losing her boyfriend.

Zac Efron
Sami Miro
Singer ex: Marc E Bassy