When she's not beating your girlfriend, Avril Lavigne is the music industry's guided weapon.
Bursting onto the scene in 2002 armed with a addictively catchy single 'Complicated', an image purposefully designed to clash with mainstream pop she has inspired a legion of punk-lite followers and pretty much changed the face of popular music single handedly.
As a commercial entity there are few worthy of comparison. Her 3 albums have all enjoyed number one status around the world and she co-written hit singles from the likes of Kelly Clarkson and Ashlee Simpson.