Knowles cheers on hubby Jay-Z at his London concert. Plus: Zac Efron, Heidi Klum, Gwen Stefani and more
Published: Tuesday Jul 06, 2010 | 05:00 PM EDT
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She's his biggest fan! Beyoncé rocks out in London alongside pal Gwyneth Paltrow at Jay-Z's concert Sunday as part of the Wireless Festival in Hyde Park.
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