Kardashian steps out for son Mason's second birthday in L.A. Plus: Sofia Vergara, Katy Perry, Justin Beiber and more
Credit: Lluis Gene/Getty
Published: Thursday Dec 15, 2011 | 02:00 PM EST
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Sporting one of her favorite stage ensembles, Rihanna gives fans what they want at a concert in Barcelona, Spain, on Wednesday.
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