"Hey, Soul Sister" is a song by the American rock band Train, written by lead singer Patrick Monahan, Amund Bjørklund, and Espen Lind. It was released as the lead single from the band's fifth studio album, Save Me, San Francisco.The song reached number three on the Billboard Hot 100 chart and is Train's highest charting song to date. As of September 21st 2012, it had sold over 6 million digital copies in the US.