Lavigne released her debut album, Let Go, on 4 June 2002 in the U.S., where it reached number 2 on the Billboard 200. It peaked at number 1 on the Australian, Canadian, and UK charts. This made Lavigne, at 17 years old, the youngest female soloist to have a number 1 album in the UK until that time.[33] By the end of 2002, the album was certified four-times platinum by the RIAA, making her the bestselling female artist of 2002 and Let Go the top-selling debut of the year.[34] By May 2003, Let Go had accumulated over 1,000,000 sales in Canada, receiving a diamond certification from the Canadian Recording Industry Association.[35] As of 2009, the album has sold over 16 million units worldwide,[36] and the RIAA has certified the album six-times platinum, denoting shipments of over six million units in the U.S