KEITH'S BEAUTY BINGES

Diva regimen rivals Nicole's

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VAIN country crooner Keith Urban shells out a fortune on nips and tucks and beauty treatments every week to keep up with his youthful-looking wife, Nicole Kidman, sources tell GLOBE!

The 57-year-old Aussie “looks fantastic and it’s not by accident, he puts a lot of time and effort into it,” tattles a tipster.

“Nicole jokes that he spends more time in front of the mirror than she does, which is quite possible — he’s a real peacock!” snarks the spy.