Wikipedia
Straatdeuntje ("Street Tune") was the Belgian entry in the Eurovision Song Contest 1957, performed in Dutch by Bobbejaan Schoepen.
The song was performed first on the night (preceding Luxembourg's Danièle Dupré with " Amours mortes (tant de peine)"). At the close of voting, it had received 5 points, placing 8th in a field of 10.
The song is a moderately upbeat number, with Schoepen singing about a tune wandering up and down a street and being heard (and presumably performed) by all who hear it. The performance is memorable as well, as it featured a whistling solo. Schoepen is also rumoured not to have known which song he was to perform at the Contest until he arrived, only rehearsing his entry once before performance.
It was succeeded as Belgian representative at the 1958 contest by Fud Leclerc performing " Ma petite chatte".