At the age of 16, Lavigne signed a recording contract with Arista, (now RCA Records), in a two-album deal worth more than $2 million. When she was 17 years old, her debut album "Let Go" was released, making Lavigne the youngest female soloist to reach #1 in the UK and certified four-times platinum by the Recording Industry Association of America.
As of 2009, over 16 million copies of "Let Go" have been sold worldwide, with more than 6 million sold in the US. Her breakthrough single, "Complicated", peaked at #1. Lavigne's second album, "Under My Skin", was released in 2004, peaking at #1 on the US Billboard 200 chart, selling more than 10 million copies worldwide.
Lavigne has so far scored a total of five #1 singles worldwide, including "Complicated", "Sk8er Boi", "I'm With You", "My Happy Ending" and "Girlfriend".