Sebastien \"Seb\" Lefebvre, is a Québécois musician best known as the rhythm guitarist and vocalist in the pop punk band Simple Plan. Lefebvre grew up in Laval, Québec, and used to work as a janitor at his old high school; College Beaubois in Pierrefonds, Quebec.
Lefebvre's surname is properly pronounced, among French speakers, \"le-fave\", but English speakers generally pronounce it \"le-fevra\". He has commented on the difference, without pronouncing the French, in his podcasts. On the DVD A Big Package for You, he pronounces it \"le-fever\" when he introduces himself; however the other band members can be observed smirking as he does so.