costee, the third act revealed to be competing in this year’s UMK 2025, has released the song and music video for his entry, “Sekaisin.” Written by Jussi Tiainen (costee), Teemu Javanainen, and Tomi Tamminen, costee combines pop with traditional Finnish rock vocals to create a dark, yet hopeful song. costee, whose real name is Jussi Tiainen, has had a quick …