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Gnarls Barkley

Gnarls Barkley DJ and producer Danger Mouse (Brian Burton) was already an internet celeb for his "Grey Album," a mash-up of Jay-Z and the Beatles. Then he joined forces with rapper-singer Cee-Lo Green (Thomas Callaway) to create Gnarls Barkley and the blogosphere's hype machine went into warp speed. Last year's debut, "St. Elsewhere," won a Grammy award for best alternative music album and spawned the ubiquitous "Crazy," another Grammy winner that Cee-Lo himself dubbed "an instant classic." Matthew Donaldson / Atlantic Records