Kid Rock says he is hoping for a guest appearance by Martina McBride on his next album, which is tentatively slated for a summer 2010 release. He and McBride performed together during a nightly concert at the CMA Music Festival last month in Nashville. In an interview with the Detroit Free Press, Rock says that he would like to recruit either McBride or Mary J. Blige to sing on the chorus of a new song called "Care." He is currently working on the album with producer Rick Rubin. "There's very good rock-feeling stuff, very soulful stuff," he told the Free Press. "I'm focusing on great melodies, really great American rhythm-and-blues, rock-'n'-roll-based stadium songs."