In another incarnation, the St. Paul, Minnesota native is known as the cult indie rocker Sean Na-Na. He first emerged as a recording artist in the St. Paul band Calvin Krime in the late '90s; his self-titled debut as Har Mar Superstar was released in 2000, launching his libidinous, sometimes b-boy-prone R&B persona. The 2002 follow-up, while still dabbling in irony, turned out to be a more fully realized, well-produced, and downright funky release. The project forced many to recognize that trapped inside this chubby white man (who looks like a cross between porn legend Ron Jeremy and comic actor Jack Black) is a first-class soul crooner. In fact, Rolling Stone magazine featured Har Mar Superstar as one of its "new faces" of 2002. Though Warner Bros. dropped Har Mar Superstar from their main roster in 2003, Tillmann was back the following year with a new album, Handler, on Record Collection, one of the label's boutique imprints.
After a five-year gap, Har Mar returned in 2009 with the more disco-oriented Dark Touches, before eventually transitioning to a more classic soul/R&B sound in 2013 with his fifth album, Bye Bye 17. A year later, Tillmann kept busy collaborating with actor/singer Macaulay Culkin in the satirical covers band the Pizza Underground. In 2016, he delivered his sixth Har Mar Superstar album, Best Summer Ever. Conceived as a fake compilation album featuring Har Mar Superstar's best cuts from "1950 to 1985," the album included a cover of the Strokes vocalist Julian Casablancas' song "Youth Without Love" and appeared on Casablancas' own Cult Records. ~ Erik Hage, Rovi