Adam Seth Gardner (born May 31, 1973) is an American guitarist and vocalist of the band Guster^[1] and a member of the Tufts University Beelzebubs.

Gardner grew up outside Morristown, New Jersey, and played for a band called Royal Flush while a student at the Pingry School, from which he graduated in 1991.^[2] He also attended Harding Township School in New Vernon, New Jersey. Gardner, working with Dave Schneider, created a side-project in 2005 called The LeeVees. Its album, Hanukkah Rocks, consists of humorous original songs about the Jewish holiday. After living in Brooklyn near the other members of Guster for a time, Gardner relocated to Maine.^[3]

Gardner broadcasts a weekly radio show in Portland, Maine where he discusses everything from music to environmental issues.^{[citation needed]}

Adam and his wife Lauren started Reverb, an eco-friendly companion to summer rock tours. Gardner was interviewed about Reverb for the July 2006 issue of The Green Room.