After FÅ Mathias Rust who played Johan Hult had a very brief career as a pop star with the band Mathias Rust & 0520
The band existed before the movie came out though and Mathias was already a member of it
Needless to say the success of the film gave the band a lot of publicity and they released at least one single (that seems almost impossible to get hold of these days)
There is still a site on the web from back right after FÅ that mentions them
http://www.blupp.nu/film/artiklar/1999/rust.html