Jack's Mannequin was an American rock band formed in 2004 as a side project of Andrew McMahon, the lead vocalist, pianist, and primary songwriter of the bands Something Corporate and later, Andrew McMahon in the Wilderness. The band was characterized by a blend of piano-driven rock and pop, with notable influences from punk and alternative music. Their debut album "Everything in Transit" (2005) reached critical acclaim for its introspective lyrics and unique sound. Despite the band's dissolution in 2012, their music continues to be influential in the pop-rock genre.