Heather Locklear may be the more famous actress, but Ava Sambora is the real stunner in a short black dress at the premiere of her movie "This is 40 in Hollywood. Plus, "Amazing Race" runners-up Jaymes Vaughan and James Davis go shirtless to fight cancer; Katy Perry and John Mayer attend "A Christmas Story, The Musical" on Broadway; stars come out for the 14th annual Women's Image Network Awards in Hollywood; Cate Blanchett looks gorgeous in white gown at London screening of "The Hobbit: An Unexpected Journey"; and Ludacris and Justin Bieber share stage at Power 96.1 s Jingle Ball 2012 in Atlanta.


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