But, the party for Kidman's Australian pals didn't focus on Urban's problem at all. "We didn't talk about it," Simon Baker, who was one of the guests, told People magazine.
Nicole "is a survivor," he told People. "She just keeps moving forward."
Kidman may be busy with her Pilates classes, work meetings and visiting her sister, Antonia, but she still made time to visit Urban at the facility where he is being treated before heading to London for the filming of "The Golden Compass."
Urban is being supported by his fans and friends in the world of country music, the magazine said.
Dolly Parton said recently, "I love Keith. He's going to be just fine."
Wynonna Judd, who also went through rehab, urged Urban recently to "realize we're not alone" and to take advantage of "the great support group out there."
Urban's new album, "Love, Pain & the whole crazy thing" will be released on Nov. 7.
2014: The Year in Music [PHOTOS]