sentences:  In Canada, the album debuted at number one with 68,000 copies sold, slightly more than "Under My Skin".In its second week, there was a 62% sales drop to around 26,000 copies.In Australia, "The Best Damn Thing" debuted on the ARIA Albums Chart at number two and shipped over 35,000 copies, being accredited Gold by ARIA; it was Lavigne's first album not to reach number one.