Beyonce

When Beyonce goes schizo -- dividing her musical persona into balladeer Beyonce and club diva Sasha Fierce -- she is certainly organized about it. She dedicates the first side to the 'Yonce persona and the second to Fierce. Both halves are great. The gorgeous, sweeping "Halo" displays her incredible range and knack for squeezing pathos from stone, while the second half's "Diva" offers Fierce a chance to strut through Bangladesh's stuttering production while proclaiming, "Diva is the female version of a hustler."