Pop rockers MGMT have enlisted American TV icon Henry Winkler, who played "Fonzie" on the beloved 70s sitcom Happy Days, to appear in its latest music video.  The video accompanies the band's latest single, "Your Life Is a Lie," and showcases the fun side of the group.  The single comes from the band's upcoming third studio effort, due September 17th.  "Your Life Is A Lie" is the second single from the self-titled album, following "Alien Days" which debuted on April 20th.