Rallies seeking justice for slain teen Trayvon Martin have been planned for 100 cities across the U.S. today, and Jay Z and Beyoncé have arrived at the New York City rally. George Zimmerman was acquitted on second-degree murder and manslaughter charges in the shooting death of the unarmed teenager last week, and the rallies were organized by Rev. Al Sharpton's National Action Network to push for civil rights charges to be filed against Zimmerman.

Last night, Jay Z dedicated "Young Forever" to Martin at his Yankee Stadium show with Justin Timberlake.

Jay Z and Beyoncé can be seen above with Martin's mother, Sybrina Fulton, who attended the New York City rally with his brother, Javaris Fulton.

The arrival of hip-hop's power couple reportedly inspired chants of "No concerts in Florida!" Earlier this week, Stevie Wonder announced that he would not perform in Florida until the controversial "Stand Your Ground" law was repealed:

[via Twitter]

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