South Park S07 E09 Christian Rock Hard

"Four boys. One f**ked-up town."

The boys have hit a crossroads with their band "Moop." Cartman wants the band to play Christian Rock, and leaves the band when Stan, Kyle, and Kenny don't agree. Before leaving, Cartman bets Kyle $10 that he will get a platinum album with a Christian Rock band before "Moop" can.