Warning to Nicole: Keith can't commit

Keith Urban’s ex-girlfriend has a warning for Nicole Kidman: he can’t commit. Kidman is rumored to be engaged to Urban, but a woman who says she dated the former cocaine addict for years and was also engaged to him warns “The Stepford Wives” star that she believes Urban can’t truly commit to any woman. “Nicole and Keith might date for a while — but it won’t last very long,” Laura Sigler told the UK paper The Sun. “I don’t know her but I know him very well.” She continued: “There were a lot of lows with the drugs. I don’t have any dark past — he was probably the darkest part, but I’m on my own now and I’m happy about that.” Gary Shaw, Urban’s first manager, also doesn’t think Nicole has a future with the country music star. “I’ll be very surprised if the relationship lasts,” said Shaw. “He is in it for the chase. He likes to go after what he wants and if he can’t have it, he wants it even more. He would be intrigued by anything and anyone he couldn’t get.” [MSNBC] Thanks to JJb for pics