"20 Y.O." debuted on the US "Billboard" 200 at number two with 296,000 copies sold at its first week, behind Ludacris' album "Release Therapy". This was considerably lower than Jackson's previous album "Damita Jo", which also opened at number two with 381,000 copies sold across the United States in 2004. "20 Y.O." became her smallest first week sales since "The Velvet Rope" (1997), which reached number one with 202,000 copies. However, the effort debuted at the top on the Top R&B/Hip-Hop Albums. In its second week, the album fell to number nine, selling 77,000 units, representing a 74% drop in sales. It additionally reached number two and number three on Top Digital Albums and Top Tastemaker Albums charts, respectively. On November 13, 2006, the album was certified platinum by the Recording Industry Association of America (RIAA) for shipments of one million copies within the country. As of January 2008, the estimated sales of the album in the US were 679,000 copies.