Musicella Song Contest

Thomas has participated in Musicella Song Contest since the first edition held in Barcelona, Spain.

He debuted in the contest with "Ask Beni" by Sertab Erener, representing Turkey. They placed 17th in the semi-final, failing to qualify, however it did remain his best result in the contest until edition 9.

On 5 September 2018, he confirmed that he would represent Belgium from edition 9 of the contest onwards. In edition 9, he entered the song "Feed Me" by Mustii, which qualified for the final and finished in 10th place. This marked his first appearance in the final.