Avril Lavigne is a musician.
Avril Ramona Lavigne ( [ ˈævrɪl_ləˈviːn ] [ avʁil laviɲ ] ) ( born 27 September 1984 ) is a Canadian singer-songwriter and actress . The Best Damn Thing , Lavigne 's third album , was released in April 2007 , becoming her third number 1 album in the UK Albums Chart and featuring her first US Billboard Hot 100 number 1 single , `` Girlfriend '' . `` Girlfriend '' is a song by Canadian singer-songwriter Avril Lavigne .