R&B songstress Kelis might be singing about baby formula instead of milkshakes soon. The Harlem singer is reportedly expecting her first child with her hip-hop husband, Nas, according to the San Francisco Chronicle. Kelis, 29, married 35-year-old Nas in 2005, and insiders say she is already showing signs of a baby bump. A source says, “It’s all they are talking about. They are so excited.”—BB