Bad habits lead to... 10 celebrity romances ruined by addiction

Noah Cyrus revealed this week she "bonded" with her mystery ex-boyfriend" over tranquilisers. The younger sister of pop superstar Miley Cyrus told Rolling Stone magazine how she wanted to" fit" in with her partner when they started taking Xanax together. With drugs being their biggest connection, the relationship was destined for disaster. Here's 10 other celebrity couples whose romances were ruined by substance and alcohol abuse...