Prince debuts song about Baltimore at "Rally 4 Peace" concert

Prince performs at the 2013 Billboard Music Awards at the MGM Grand Garden Arena on May 19, 2013 in Las Vegas.

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Prince took the stage in Baltimore before thousands of fans who were dressed in gray in tribute to a man whose death in police custody prompted riots and drew international attention.

The pop star announced Sunday's "Rally 4 Peace" concert at the Royal Farms Arena Baltimore after weeks of protests over the death of Freddie Gray. During the show, Prince debuted a song he wrote for the city in the wake Gray's death.

"For those who have lost loved ones, we're here for you tonight," Prince told the crowd before launching a set that included his most famous hits.

Prince also called on the city's youth to fix a "broken system."

At one point, Prince invited onstage Baltimore State's Attorney Marilyn Mosby, who has charged six officers in Gray's death.

The concert was available on the streaming service Tidal.

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Prince fans wait to enter a "Rally 4 Peace" concert in Baltimore, Maryland on May 10, 2015. Musical artist Prince is holding the concert in Baltimore on Mother's Day after the death in police custody of an African-American man sparked sometimes violent protests.
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Prince recently embarked on a "Hit & Run USA" tour along with his band 3rdEyeGirl in which he announces surprise concerts just days before he performs.