{blackbabes} We Hear...

That Alicia Keys,eight months pregnant, is cutting it close. She will host her annual Black Ball at Hammerstein Ballroom Sept. 30 and perform with Jay-Z and Sade . . . THAT David Barton has declared today "Diane Day" at his gyms across the country in honor of his sister, who died five years ago, and intends to raise $100,000 for the Clearity Foundation and Ovarian Cancer Research Fund . . THAT photographer Harry Benson, billionaire Pepe Fanjul, designer Nicole Hanley and writer Taki Theodoracopulos will be among those at tomorrow's Quest 400 cocktail party at Doubles, where the magazine will unveil its list of top socialites.