Jannika Ona Elisabeth Wirtanen (née Bergroth, born 28 February 1985) is a singer from Finland. She participated in Finnish Idol in 2007 and 2008 and in Finnish X Factor 2009. After a few appearances on Finland's Swedish-language station Yle Radio Vega, she released her first song "Kuin kynsi lakattu" in 2009 but released her first official single "Onnenpäivä" in 2011. In February 2012 she founded an independent record label "Ona" with distribution agreements with Sony Music.