Sean Tillmann, also known by his stage name Har Mar Superstar, is an American songwriter and performer who makes contemporary R&B, pop and soul music. What started as a one-man show in 1999 has grown into a full-band revue. In addition to being a solo artist, Tillmann has written songs for Jennifer Lopez, Kelly Osbourne and Ben Adams. He has released six albums since 2000. Often noted as a premier live act, Tillmann works the crowd and earns his keep with sweat equity. A grueling tour schedule has made this Minneapolis, Minn., outfit a show not to miss.