Mariah Carey

Always a trendsetter, Mariah Carey suffered a wardrobe malfunction the day before Anne Hathaway's notorious nipple dress disaster.

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At So So Def's 20th Anniversary Concert at Atlanta's Fox Theater Saturday night, the American Idol judge's strapless dress slipped dangerously low, exposing a little too much as she presented Jermaine Dupri with a birthday cake.

The malfunction went unbeknownst to Carey, who continued to wave to fans on stage.