Nas, A Tribe Called Quest, Mos Def, Ghostface Killah, Method Man and Rakim are among the artists signed on to perform at the traveling 'Rock the Bells' festival, which kicks off on July 19 in Chicago, wrapping August 30 in Vancouver. The ten-city tour will also act as the reunion for '90s alternative hip hop group the Pharcyde.

"This year's line-up represents, respects and recognizes the diversity and inspirational possibilities often promised, but rarely delivered in a live hip-hop experience," Chang Weisberg of Guerilla Union, the event's organizer, said in a recent interview. "We really feel that this year's group of artists define our platform and further galvanize the legacy that Rock The Bells has earned through the years."

De La Soul, Raekwon, Immortal Technique, Dead Prez, Murs and Kidz In The Hall will hit the stage, along with newcomers Kid Sister, Spank Rock, Santogold, Flosstradamus, Jay Electronica, Wale, and The Cool Kids.