Gwen Stefani -- Lady in Red ... Bikini

1/4/2010 5:00 PM PST BY TMZ STAFF
The only person Gwen Stefani should be photographing is herself!

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The 40-year-old mother of two showed off her rockin' bod in a red hot bikini while vacationing in St. Bart's this weekend.

Gavin Rossdale has a rough life.