[1] Finland's entries for the Eurovision Song Contest have been selected through national final competitions that have varied in format over the years.

Along with their participation confirmation, the broadcaster also announced that the Finnish entry for the 2023 contest would be selected through Uuden Musiikin Kilpailu 2023.

The competition consisted of a final on 25 February 2023, held at Logomo in Turku and hosted by Samu Haber.

[3] The show was broadcast on Yle TV1 with a second audio program providing commentary in Finnish by Mikko Silvennoinen, in Swedish by Eva Frantz and Johan Lindroos, in English by Jani Kareinen, in Russian by Levan Tvaltvadze, in Ukrainian by Galyna Sergeyeva, in Finnish Sign Language by Miguel Peltomaa, in Northern Sami by Linda Tammela and in Inari Sami by Heli Huovinen.

At least one of the writers and the lead singer(s) had to hold Finnish citizenship or live in Finland permanently in order for the entry to qualify to compete.

On 8 April, Käärijä performed during the PrePartyES event, which was held at the Sala La Riviera venue in Madrid, Spain and hosted by Victor Escudero, SuRie and Ruslana.

[14] On 15 April, Käärijä performed during the Eurovision in Concert event which was held at the AFAS Live venue in Amsterdam, Netherlands and hosted by Cornald Maas and Hila Noorzai.

[16] According to Eurovision rules, all nations with the exceptions of the host country and the "Big Five" (France, Germany, Italy, Spain and the United Kingdom) are required to qualify from one of two semi-finals in order to compete for the final; the top ten countries from each semi-final progress to the final.

On 31 January 2023, an allocation draw was held, which placed each country into one of the two semi-finals, and determined which half of the show they would perform in.

The broadcast of the first semi-final on Yle TV1, which included the participation of Finland, reached an average of 1.337 million people over the age of 3, which represents a 78% market share.

The LED screens transitioned from a giant shadow mimicking Käärijä's movements with a snake tongue to rainbow colours at the end of the song.

[27][28][29] The four dancers that joined Käärijä on stage were Etel Röhr, Jesse Wijnans, Katri Mäkinen and Matti Maxim, while an off-stage backing vocalist was also featured: Aija Puurtinen.

[30] At the end of the show, Finland was announced as having finished in the top 10 and subsequently qualifying for the grand final.

This jury judged each entry based on: vocal capacity; the stage performance; the song's composition and originality; and the overall impression by the act.

The individual rankings of each jury member in an anonymised form as well as the nation's televoting results were released shortly after the grand final.