According to Wikipedia, Subwoolfer is a British-Norwegian pop duo formed in 2021. The two members perform in black suits with white shirts with distinctive yellow stylized wolf-head masks and yellow gloves and ties and go by the pseudonyms Keith and Jim.

Their identities were publicly revealed on 4 February 2023 as Ben Adams and Gaute Ormåsen, during the final of Melodi Grand Prix 2023. After winning Melodi Grand Prix 2022, they represented Norway in the Eurovision Song Contest 2022 with their debut song Give That Wolf a Banana. 

Morten Thomassen of ESC Norge ran into the duo in Liverpool where they all are attending the 2023 Eurovision song contest.