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Nikula is the only judge to appear in all the seasons of Idols. Before his TV popularity, Nikula has – among other things – been a host on the Finnish radio station Radio City, and marketing manager of EMI Music Finland. Since 2007, Nikula and Kotiteollisuus frontman Jouni Hynynen have hosted Äijät, a TV show about the professions and (in the second season in 2008) hobbies of "real men". He has written a history book about Finnish heavy metal music, Rauta-aika (Iron Age), and worked as the tour manager of Finnish glam rock band Hanoi Rocks. Starting early 2007, he has been one of the early evening hosts on Nelonen Media's rock music radio station, Radio Rock.
Nikula is a Senior Lieutenant (Finnish military rank between Lieutenant and Captain) in reserve in the Finnish Defence Forces. His father is former Chancellor of Justice of Finland Paavo Nikula, and his mother is art historian Riitta Nikula. He was a competitor in the first season of the Finnish version of Dancing with the Stars, called Tanssii tähtien kanssa in 2006, finishing third. In April 2010, it was announced that Nikula will be a judge in the fifth season of Tanssii tähtien kanssa.
- "Jone Nikula jatkaa Idols-tuomaristossa". Iltalehti (in Finnish). 12 October 2006. Retrieved 28 April 2011.