Also known by the stage name Theon McInsane, Makinen rose to fame as the frontman of the Finnish glam rock band Lovex. His group's albums include Watch Out, State of Mind, and Pretend or Surrender.
His band's first hit song, "Bleeding," was released in the summer of 2005. Less than a year later, he and his Lovex bandmates recorded their debut album, Divine Insanity.
Though all of its members are Finnish, Lovex is known for primarily releasing tracks containing English lyrics. The music video for the band's single "U.S.A." was filmed in both Finland and the United States.
He was raised in Tampere, Finland. His Lovex bandmates include guitarist Risto Katajisto, a.k.a. Vivian Sin Amor; keyboardist Teppo Toivonen, a.k.a. Christian; and drummer Juho Jarvensivu, a.k.a. Julian Drain.
He and Negative frontman Jonne Aaron are both popular Finnish vocalists of the Millennial Generation.