Star Tracks
Kardashian steps out for son Mason's second birthday in L.A. Plus: Sofia Vergara, Katy Perry, Justin Beiber and more
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THE CAT'S 'MEOW'
After being named one of 2011's Most Fascinating People, Katy Perry beams while aboard a trolley Wednesday during the unveiling of her new perfume, Meow!, at The Grove shopping center in L.A.
