Jay Z & Justin Timberlake Dedicate "Forever Young" To Trayvon Martin

Justin Timberlake and Jay Z honored Trayvon Martin Friday night ... dedicating the song "Forever Young" to the 17-year-old shooting victim.
Jay and Justin kicked off their "Legends of the Summer" tour this week -- and during their closing number Yankee Stadium in NYC -Jay shouted to the audience, "Everybody put a cell phone and light it up ... let's light the sky for Trayvon Martin tonight in here."

Beyonce also dedicated a song to Trayvon ... shortly after George Zimmerman's not guilty verdict last weekend.









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