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Keith Urban will take the judges' table on "American Idol" next season ... but now we're judging him and his bathing suit bod!

The 45-year-old country superstar celebrated his birthday last Friday by the pool, where he showed off his envious body in a teeny tiny black Speedo.

With his many tattoos and impressive stomach on display, Urban spent the day with daughter Sunday Rose by the hotel pool in Saint-Jean-Cap-Ferrat, France.

The family is in the area while Nicole Kidman films her upcoming biopic about Grace Kelly. Urban's wife was spotted on set in Monaco just yesterday, where she displayed a striking resemblance to the late Princess Grace.

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How does Keith stack up against other beach bods? Check out more in the gallery above!

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