Har Mar Superstar

From Discogs:

There is no Harold Martin Tillmann, no cousin or brother to Sean Tillmann, to help with his artistic output and press coverage. First was the art-school noise-pop trio Calvin Krime, which split up in the summer of 1998. Sean went his own way and created the introspective indie dreamboat Sean Na Na. After a few years, Sean created another stage persona named Har Mar Superstar. Named after a Minneapolis-area mall that was built in 1961 and fell into disrepair, Har Mar is the sexy-smooth R&B artist who has grabbed the most attention for Sean Tillmann.

From Lastfm:

Sideproject of Sean Tilmann of Sean Na Na fame.

Har Mar Superstar is an American singer born in Owatonna, Minnesota.

While remaining relatively unknown in his home country, he has found fame in the U.K. indie rock/dance scene. His musical genre is generally lewd R'n'B music, mixed with electroclash.

He made a cameo in the 2004 movie Starsky and Hutch as "Dancin' Rick", a disco dance champion who faces off in a contest with Ben Stiller's Starsky character.

From Wikipedia:

Sean Matthew Tillmann (born February 6, 1978), better known by his stage names of Har Mar Superstar and Sean Na Na, is an American singer.