Wikipedia
Ravaillacz
Ravaillacz is a superquartet from Sweden, which participated at Melodifestivalen 2013 with the charting song " En riktig jävla schlager". Consisting of Tommy Körberg, Claes Malmberg, Johan Rabaeus and Mats Ronander, it ended up 10th.
The group also appeared at Allsång på Skansen on 6 August 2013.