As Har Mar Superstar, Sean Tillmann has used that moniker as a way to explore R&B, indie-rock, and the narrow space in which they overlap. Tillmann dropped by to tackle Built To Spill’s “Big Dipper,” a song from the band’s classic 1994 album, There’s Nothing Wrong With Love. Not only that, Har Mar Superstar offered up another song for us when he stopped by The A.V. Club office, but you’ll have to wait until Thursday to see that.