Clockwise from upper left: Missy Elliott, PWR BTTM, Macklemore and Leon Bridges, kristine leschper of the band Mothers. Courtesy of the artists hide caption

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Dave Grohl of the Foo Fighters performs at the 9:30 Club in Washington D.C. as part of the birthday celebration for Big Tony of Trouble Funk. Kyle Gustafson/Washington Post/Getty images hide caption

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Lucius was just one of the many bands worth discovering at this year's CMJ festival. Becky Harlan/NPR hide caption

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