Mos Def

Mighty Mos Def sure has changed. Six years ago, he was the ultimate backpacker, dropping classic hit singles like "Universal Magnetic"; today, he's acting in movies and making scat rap tracks like "Sex, Love, and Money." His latest album, The New Danger, has divided fans; some charitably call it a journey into experimentation, while others call it a huge disappointment. But he's still considered a great live performer, even if he's more likely to prowl the stage shirtless with a funk band than bust b-boy styles for the audience. Regardless of how his concert at Revolution turns out, it should be quite an experience.