Sébastien Lefebvre is a Canadian musician best known as the rhythm guitarist and backing vocalist for the pop-punk band Simple Plan. Born on June 5, 1981, in Montreal, Quebec, Lefebvre's musical journey began in the late 1990s when he co-founded Simple Plan with fellow band members Pierre Bouvier, Chuck Comeau, Jeff Stinco, and David Desrosiers. The band's debut album, "No Pads, No Helmets...Just Balls" (2002), featured hits like "I’d Do Anything" and "Addicted," establishing them as prominent figures in the pop-punk genre. Lefebvre has also contributed to the band's songwriting, helping to craft their signature sound characterized by catchy melodies and relatable lyrics. Notable works include the albums "Still Not Getting Any..." (2004) and "Get Your Heart On!" (2011). Beyond Simple Plan, Lefebvre has pursued solo projects and collaborations, showcasing his versatility as an artist. His impact on music is evident in the way Simple Plan has influenced a generation of pop-punk bands, blending elements of rock and pop while addressing themes of youth, love, and personal struggles. Lefebvre's contributions continue to resonate within the genre.