Avril Lavigne recorded a number one single.
Avril Lavigne . Her breakthrough single , `` Complicated '' , peaked at number 1 in many countries around the world , as did the album Let Go . Lavigne has scored six number-one singles worldwide , including `` Complicated '' , `` Sk8er Boi '' , `` I 'm with You '' , `` My Happy Ending '' , `` Nobody 's Home '' , and `` Girlfriend '' .