Erik Kristian “Eeki” Mantere (25 January 1949 – 30 April 2007[1]) was a Finnish musician who became famous in the 1970s as Viktor Kalborrek, soloist of the band Hullujussi.

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 Seppo Huunonen movie The Hair from 1974.

In the Juha Tapaninen movie, the Iskelmäprinssi from 1991, Mantere dropped the Kaborrek act and played an Italian fashion guru.

Mantere also provided voiceovers, such as his role of King Louie in the 90s remake of the Finnish sound track for the 1967 Disney movie The Jungle Book.