Photos: Elton John and Lady Gaga's Surprise LA Concert
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WEST HOLLYWOOD, CA - FEBRUARY 27: Elton John (L) and Lady Gaga perform live on the Sunset Strip, on February 27, 2016, as a thank you to the City of West Hollywood for their support of the Elton John AIDS Foundation. The concert was streamed live on AOL.com and co-presented by AOL and BBVA. (Photo by Kevin Winter/Getty Images for AOL)