Winehouse steps into the spotlight during the 46664 concert honoring Nelson Mandela in London. Plus: Rihanna & Adam Levine, Blake Lively, Mary-Kate Olsen and more

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IN THE SPOTLIGHT

After being treated for a serious lung condition, Amy Winehouse takes the stage at London's Hyde Park Friday to perform at the 46664 Concert in honor of Nelson Mandela's 90th birthday.

Watch a live webcast of the concert here.