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London Calling
Surprise! Rihanna joins mentor Jay-Z onstage Saturday in London for BBC Radio 1's Hackney Weekend, where the pair performed a rendition of their hit "Run This Town" to the delight of the crowd.
More from PEOPLE
Surprise! Rihanna joins mentor Jay-Z onstage Saturday in London for BBC Radio 1's Hackney Weekend, where the pair performed a rendition of their hit "Run This Town" to the delight of the crowd.
