Blanchett debuts her post-baby body at the Cannes International Film Festival. Plus: Christina Aguilera, Amy Winehouse & Pete Doherty, Beyoncé and more

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PARTY PEOPLE

Following her Tuesday night show at New York's Madison Square Garden, Rihanna helps beau Chris Brown celebrate his 19th birthday at Rebel. Although they've been keeping coy about their relationship, the musical couple were recently spotted cuddling in Miami.