Hey, Soul Sister is a single by the American rock band Train, released in 2009 as the lead single from their fifth album, Save Me, San Francisco. Written by lead singer Pat Monahan with producers Amund Bjorklund and Espen Lind, it became the band's biggest commercial hit, reaching number three on the Billboard Hot 100 and winning a Grammy Award for Best Pop Performance by a Duo or Group. Its signature ukulele riff made it one of the defining radio hits of the early 2010s, and it still resurfaces in online edits, nostalgic compilations and feel-good memes.