Bell bares some skin at the L.A. premiere of Couples Retreat. Plus: Jon Hamm, Rihanna, Ed Westwick & Leighton Meetster and more

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HAIR APPARENT

Chris Rock joins actress Nia Long for a party in New York City on Monday celebrating the screening of Good Hair, Rock's new comedic documentary. The film – which examines the business behind African-American hairstyles – hits select theaters Friday.