NICOLE KIC AFTER HEI FIGHT AD

Old music partner reveals drug horror

- 

NICOLE KIDMAN'S worst nightmare is being revisited as her split with country king Keith Urban has dredged up memories of the details of his addiction demons laid out by former pal and songwriting partner Vernon Rust.

The Hours Oscar winner, 58, filed for divorce late last month, citing irreconcilable differences, after futilely fighting to save the pair’s rocky romance, sources say.

The move marks a dramatic change from their initial months as husband and wife in 2006 when Nicole lovingly staged an intervention to help the struggling performer, who'd relapsed by going on a boozy bender while on tour, and stayed in the relationship as he checked into the Betty Ford Center in California to receive treatment for substance abuse.

At the time, Urban released a statement that read: "I deeply regret the hurt this has caused Nicole and the ones who love and support me. One can never let one's guard down on recovery, and I'm afraid that I have."

The Blue Ain’t Your Color singer’s Betty Ford stint was his third trip to rehab, having previously sought help in 1998 and 2000 after wrestling with a dependence on alcohol and cocaine.

Vernon — Keith’s collaborator from decades ago during the hitmaker’s tenure with the band the Ranch — dishes about his old pal in his shocking memoir, Fake News.

The tunesmith, who himself spent 14 years hooked on crack, claims in his book that he and Keith once snorted $320,000 worth of cocaine in the late 1990s during an “epic” multi-day binge.

"We lived in the studio. We did a lot of coke, and stayed up for days,” Vernon shares.

He also claims that Keith used “coke, crack and weed.”

But even before Vernon’s book bombshell dropped, Keith’s loose-lipped former bestie — who some have called Urban’s fixer — was telling all about the artist’s rock-bottom days as an addict.