Mariah Carey performs at the Hot 97 Summer Jam XX on Sunday, June 2, 2013 in East Rutherford, N.J. (Photo by Charles Sykes/Invision/AP)EAST RUTHERFORD, N.J. (AP) — New York City radio station Hot 97 celebrated its 20th annual Summer Jam concert with young rappers who are dominating the charts, a respected veteran hip-hop group and a slew of surprises.
