1. Carey, Stefani, Peas Maintain Singles Lead

    July 14, 2005 12:00 AM EDT In the thick of the summer, hit singles from Mariah Carey, Gwen Stefani and the Black Eyed Peas remain the most popular in the United States, but a new slate of contenders is on the rise. Carey's "We In the thick of the summer, hit singles from Mariah Carey, Gwen Stefani and the…