Blog: Idolator

Who's that chick throwing a Cirque Du Soleil bachelorette party for Katy Perry? Oh, it's the California girl 's BFF, Rihanna. Soon-to-be Mrs. Russell Brand donned a mini, glittery black dress, while the Battleship star wore a tight white dress as the two buds posed with the cast of "KA" at MGM Grand in Las Vegas. Pre-party the Teenage Dream tweeted , "Signing up for a liver transplant now..." Guess, that's what you get for having your bachelorette party in Vegas. Flip through to see the cirqu-defied celebration.