Rihanna & Katie Perry Take A Dip In Vegas At Bachelorette Pool Party

Talk about taking the plunge: future bride Katy Perry donned a sexy white bikini at her bachelorette pool party in Las Vegas this weekend.  The I Kissed A Girl" pop singer  singer threw her wild pool party at the Hard Rock Hotel Beach Club on Saturday, and fellow singing star Rihanna, wearing a bright red wig and a sparky gold one-piece, was among the pals taking a dip with Katy and enjoying a few cocktails.

Perry, 25, is engaged to British beau Russell Brand, 35. The couple will tie the knot this fall.

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