On December 5 , 2009 , Lavigne returned to the stage in Mexico City during the biggest charity event in Latin America , " Teleton " . She performed acoustic versions of her hits " Complicated " and " Girlfriend " with Evan Taubenfeld and band member , Jim McGorman . In 2010 , Lavigne was one of several artists who contributed their voices to a cover of K'naan 's " Wavin ' Flag " as a benefit single to help raise money for several charity organizations related to the 2010 Haiti earthquake
2010 Haiti earthquake
2010 Haiti earthquake
Avril Lavigne