"Empire State Of Mind" by Jay-Z + Alicia Keys tops the 5 million mark in digital sales this week. It's the biggest-selling hit for both artists. Jay-Z's second best-seller is Rihanna's "Umbrella," on which he was featured, which has sold 4,089,000 copies. Keys' second-best-seller is "No One," which has sold 3,705,000 copies. "California Gurls" by Katy Perry featuring Snoop Dogg, which was inspired by the success of "Empire," has sold 5,358,000 copies.
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