Costee (born Jussi Tiainen, 1995) is a Finnish singer-songwriter from the Turku region who rose to prominence with emotionally raw, Finnish-language alternative pop. His 2019 debut album 'Ehkä joskus tää viel naurattaa' went double platinum and spent 71 weeks on the Finnish album chart; three more platinum albums followed, along with sold-out headline shows and an Emma Gala win for Best Newcomer in 2020. In 2022 he founded his own label, Tuhma Music.
Costee became a father in March 2026 with actress Joanna Wallinheimo.
Costee released his fourth album 'Nää pirut on mun kavereit' on 5 September 2025, which had already reached platinum certification before release.
Costee embarked on the sold-out 'Cult of costee' club tour in autumn 2025, playing Helsinki Tavastia, Turku Teatteri and Jyväskylä Lutakko.
Costee competed in UMK 2025 with 'Sekaisin', finishing sixth in the final held at Nokia Arena in Tampere on 8 February 2025.
Costee's UMK entry 'Sekaisin' was released on 13 January 2025 and rose to become the second most-streamed song in Finland on Spotify.
