Shu-bi-dua

Shu•bi•dua or Shu-bi-dua is a Danish pop group that was formed in 1973 in Copenhagen.
Shu-bi-dua changed their lineup many times, however their lead singer was with the band throughout, except for the gap between 1984 and 1987. 
They have produced many well-known hits in Denmark, like "Vuffeli-vov", "Hvalen Hvalborg", "Står på en Alpetop", "Stærk Tobak" (to the music from the Phil Medley and Bert Russell song "Twist and Shout"), "Familien kom til Kaffe", "Sex Chikane", "We wanna be free", and many more. 
They are the Danish band with most selling albums in Denmark.