Black & Blue is the fourth (third in the U.S.) album of the American vocal-pop group Backstreet Boys. It is their follow-up album from their 1999 studio release Millennium. The album recorded the best international sales in a week for an album in history by selling over 5 million copies in its first week of sales globally. In the United States, Black & Blue sold 1.6 million copies in its first week of release, making the Backstreet Boys the first group in Soundscan history to have million-plus first-week sales with back-to-back albums. As of 2007, the album has sold 24 million copies worldwide.