Atl are a vocal group from Atlanta, Georgia. The vocalists are Tré, Will, L-Rock and rapper Danger. They had enlisted R. Kelly to produce their début album The Atl Project, released in July 2004. Two singles released from this album: "Calling All Girls" (#12 UK Singles Chart, May 2004), and "Make It Up With Love" (#21 UK, August 2004).   Wikipedia