She might have the money to throw an exuberant bash, but Nicole Kidman kept it low key as she celebrated her 45th birthday last night.
Nicole and her husband Keith Urban shared a date night at Lady Gaga's Born This Way Ball in Sydney, and were spotted sneaking in to the Allphones Arena through the back door.
Keith had earlier treated her to a slap up meal with her parents at The Apollo restaurant in Potts Point before heading to the gig.
Nicole was wrapped up warm in a suede coat and chunky scarf as temperatures dipped to four degrees.
Not that Gaga noticed, donning her usual skimpy get-up on stage.
The singer is playing two more dates in Sydney before heading on to Melbourne and then Perth on the Aussie leg of her world tour.
> IN PICS: GAGA'S BORN THIS WAY BALL TOUR
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