Sébastien Lefebvre (born June 5, 1981) is a French Canadian musician, who is best known as the rhythm guitarist and backing vocalist for pop punk band Simple Plan. He has also released solo albums and duo work.
During early 2009 Lefebvre recorded an acoustic EP entitled You Are Here / Vous Êtes Ici, released October 20, under Coalition Entertainment (Records) Inc. The first single "I Fall for You" was released on September 8. A music video was released on YouTube. The music video is directed by Simple Plan band mate, Chuck Comeau.
Lefebvre released a free solo EP, called Les Robots, in 2011.