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

BEJEWELED

Sporting a plethora of sparkling accessories from Chanel – not to mention the chic sunglasses and daring do – Rihanna steps out stylishly in Paris on Tuesday for the Chanel prêt-à-porter fashion show.

See more of Rihanna's Paris fashion in StyleWatch!