Lavigne’s breakthrough single, “Complicated”, reached number one in several countries worldwide and made her the youngest female soloist to have a number-one album in the United Kingdom. Her second studio album, Under My Skin (2004), became Lavigne’s first album to reach the top of the Billboard 200 chart in the United States, going on to sell 10 million copies worldwide. The Best Damn Thing (2007), Lavigne’s third studio album, reached number one in seven countries worldwide and saw the international success of its lead single “Girlfriend”, which became her first single to reach the top of the Billboard Hot 100 in the United States. Her fourth and fifth studio albums, Goodbye Lullaby (2011) and Avril Lavigne (2013), saw continued commercial success and were both certified gold in Canada, the United States, and other territories. In February 2019, Lavigne released her sixth studio album, Head Above Water, through BMG.