Usher's fourth studio album, "Confessions", was released on March 23, 2004—just as its first single, "Yeah!", was in its sixth week at number one on the "Billboard" Hot 100 and fifth week on top of the Hot R&B/Hip-Hop Singles Chart. The album's nearly 1.1 million unit debut sales was the highest first-week numbers ever scanned by a male R&B artist and the seventh best of the Nielsen SoundScan history. The album has since sold over 15 million copies worldwide, with over 10 million in the United States, earning the album a Diamond certification by the RIAA.