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After nude photographs allegedly depicting music star Rihanna hit the Internet last weekend, the singer's representatives are fighting back, according to TMZ.

The legal department at Rihanna's record label, Island Def Jam, has apparently sent a letter to a website that posted the pictures, demanding that they be taken down.

It is not clear that Rihanna is the person featured in the nude photographs, although she is visible in two clothed pictures, and TMZ reports that the letter also doesn't make it clear if Rihanna is, in fact, the subject of the nude images.