 " Elementary School Musical " is the season premiere of The Simpsons ' twenty @-@ second season . It aired on the Fox Network in the United States on September 26 , 2010 . In this episode , Krusty the Clown invites Homer to the Nobel Peace Prize Ceremony in Oslo , Norway . Later turning out to be a hoax , Krusty is sued by the International Court of Justice for his many instances of public indecency . Meanwhile , Marge takes Lisa to a performing arts camp for a week . 
