The American Idol gives another "Heartless" performance in New York City. Plus: Zac Efron, Ellen Pompeo, Paris Hilton and more

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SHE'S SAFE!

A cheery Katy Perry takes the mic for a good cause Wednesday at an H&M store in Harajuku, Japan, where she promoted the Fashion Against AIDS! clothing line to benefit various AIDS awareness projects. The singer was among the music stars – including N.E.R.D. and Estelle – who designed a piece of clothing with a safe-sex slogan on it.