Nicole Kidman has reportedly split from her country-singer fiancé Keith Urban.

Kidman apparently made the decision fearing that Urban, an alcoholic crack cocaine addict, has not fully reformed.

He is said to be devastated by Kidman's decision that comes two weeks after she was publicly wearing her 3.5-carat engagement ring.

One of Urban's former girlfriends Laura Sigler told the Mail on Sunday she predicted the celebrity relationship would end. " Keith is charming and very charismatic, but not reliable," she explained. "He had numerous flings while we were together. He is very attractive and when he talks the talk, he can be very seductive. But I'm not sure Keith will ever be ready to settle down."

Kidman and Urban were expected to marry early this year, but the Moulin Rouge star has now apparently broken the engagement and told Urban she needs time to think.