Erik Kristian “Eeki” Mantere (25 January 1949, in Helsinki – 30 April 2007, in Espoo) was a Finnish musician that became famous in the 1970s as Viktor Kalborrek, soloist of the band . After Hullujussi disbanded in 1976, Mantere continued to perform as Viktor Kalborrek until the new millennium, albeit mainly in restaurants, department stores and TV programs. Playing a character that strongly resembled Kalborrek, he acted in the movie The Hair from 1974. In 1989, he played Kalborrek in a supporting role in the Visa Mäkinen film . In the Juha Tapaninen movie, the from 1991, Mantere dropped the Kaborrek act and played an Italian fashion guru.