"The Best Damn Thing" became Lavigne's third album to reach number one on the UK Albums Chart. The album debuted at number one on the US "Billboard" 200 with about 289,000 copies sold, less than "Under My Skin", which sold 381,000 in its first week. It is Lavigne's second number-one album, after "Under My Skin". "The Best Damn Thing" remained at number one in its second week on the chart, selling about 121,000 copies. As of September 2015, "The Best Damn Thing" had sold 1.7 million copies in the US.