Aussie singer Sia got famous cooing moody tracks for Zero 7 and Six Feet Under, but there's a perky dance diva trapped behind her blond bob. On her first album of uptempo numbers, the 34-year-old combines disco funk with the throwback soul of U.K. crooners like Adele. Her secret weapon: Strokes guitarist Nick Valensi, whose chugging riffs and loopy lines give her boogie-woogie real teeth. "Bring Night" bops like an Eighties rave-up, and Sia finds the sweetness in Madonna's "Oh Father," brightening it into an airy, blippy closer.

“Karma Chameleon”

Boy George has said this song was about standing by what you believe in. However, at the time, he was involved in a secret affair with Culture Club drummer Jon Moss. "Now people can understand the songs better," he said. "They were written about my relationship with Jon, and they were also written about being a gay man in a homophobic world." The lines "If I listen to your lies, would you say/I'm a man without conviction/I'm a man who doesn't know how to sell a contradiction," described his life at the time, he said. "I was selling this big lie."