Har Mar Superstar is one of the many performing monikers of American singer, songwriter, and actor Sean Tillmann, who also operates under the names Sean Na Na, Calvin Krime, and Heart Bones. Known for his effusive and sweaty live performances, Har Mar is an R&B, contemporary pop, and retro-soul singer who is as talented as he is occasionally over-the-top. Since debuting in 2000, he has shared stages with the Strokes, Red Hot Chili Peppers, Sia, Lizzo, and the Afghan Whigs, and has issued a string of well-received singles, EPs, and albums, including The Handler (2004), Bye Bye 17 (2013), and Roseville (2021)

Tillmann 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 on Kill Rock Stars. The 2002 follow-up, You Can Feel Me, 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 despite his outrageous persona and theatrical stage outfits, Tillmann 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. Returning in 2021 with a seven-piece band, he released Roseville, which served as a love letter to his hometown of St. Paul. ~ Erik Hage & James Christopher Monger, Rovi