Swift catches a case of the giggles during a TV appearance in Toronto. Plus: Gwen & Zuma, Rihanna, Nicole Richie and more

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RISE & SHINE

Demi Lovato makes a cheerful exit from New York's ABC Studios on Thursday after a visit to Good Morning America, where the teen star discussed her new show, Sonny with a Chance, which airs Feb. 8 on the Disney Channel.