Sia—aka Sia Furler—does for little blacks sandals what Rihanna did for umbrellas. It's not hip-hop, but it's plenty catchy. (Check out her Web site, where she channels Miranda July.) You may recognize her voice from her work with Jamiroquai (or maybe not) or from Six Feet Under, which used her song, Breathe Me, in its finale. Her new album is Some People Have Real Problems.

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