No more just The Material Girl, Madonna is The Collector. The singer-actress has joined Bill Cosby, Barbra Streisand and other celebrities on a list of the top 100 collectors in America, Art & Antiques magazine said. Madonna, who earned $46 million in 1988, is a newcomer to the annual list - cited for her "top-notch collection of vintage photographs, particularly female nudes and boxers, and paintings by European masters." Cosby and his wife fill their home with American furniture and art, especially Shaker, and are the premier collectors of black folk art, the magazine said. Streisand favors Frank Lloyd Wright furniture and recently paid $363,000 for a 1903 sideboard that once graced designer Gustav Stickley's dining room.