Keith Urban's ex-fiance warns Nicole Kidman.

Laura Sigler dated Urban for eight years and believes the former crack addict will not commit to a long-term relationship with the Hollywood superstar, despite their reported engagement over the US Thanksgiving weekend last month (NOV05).

She says, "Nicole and Keith might date for a while, but it won't last very long. I don't know her but I know him very well.". . . . . .Full Story