Jere Pöyhönen (Finnish pronunciation: [ˈjere ˈpøy̯hønen]; born 21 October 1993), known professionally as Käärijä (Finnish: [ˈkæːrijæ]), is a Finnish rapper, singer and songwriter. He represented Finland in the Eurovision Song Contest 2023 with the song "Cha Cha Cha", finishing first in the public vote and coming in second place with 526 points. His entry topped the charts in Finland, Lithuania, Latvia, and Sweden, and reached the top ten in thirteen other countries including the United Kingdom, becoming the first ever song in Finnish to reach the Top 10 of the UK Singles Charts.

Source: Wikipedia (https://en.wikipedia.org/wiki/K%C3%A4%C3%A4rij%C3%A4)