Alicia Keys & Jay Z -- Perform in the Concrete Jungle (VIDEOS)

Alicia Keys & Jay Z -- Perform in the Concrete Jungle (VIDEOS)

TMZ

Alicia Keys and Jay Z busted out NYC's anthem in Times Square. The singer held a surprise concert where a bunch of other stars also showed ... including Jay Z. Check out the vid ... they rocked "Empire State of Mind" and the crowd went nuts when…

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