Der Hölle Rache

"Der Hölle Rache" is a song from Mozarts opera The Magic Flute. It was sung by Kenny McCormick in the Season Four episode, "Quintuplets 2000".

Background
After finally arriving at the Romanian music school, Kenny sings in front of a large audience. When he finishes the song they people throw roses and cheer. The head of the school asks for Kenny and his to stay in Romania.