It appears Madonna's officially got her groove back. Her latest album, the well-reviewed Confessions on a Dance Floor, debuted at No. 1 on Billboard's album chart with 350,000 copies sold. That's 109,000 more copies than her last effort, 2003's disappointing American Life, moved in its first week in stores. Also bowing strongly was American Idol champ Carrie Underwood's debut effort, Some Hearts, which took the No. 2 spot with nearly 315,000 copies.