Kari Tapio recorded "Aikaan täysikuun" (When it's full moon time) in 1989 for his eponymous album. The song cecame a radio hit. The Finnish lyrics were written by Kari himself. The original song "California Blue " was on the "Mystery Girl" -album, the last album recorded by Roy Orbison, posthumously released in 1989. It was also a minor hit when released as a single. The song was written by Orbison with Jeff Lynne and Tom Petty.
Here's the pair: