 Of the five singles released for the episode , three debuted on North American top 100 charts . " Somebody That I Used to Know " sold 152 @,@ 000 digital downloads in the US , and was number twenty @-@ six on the Billboard Hot 100 . One other single charted on the Hot 100 : the mashup of " Hungry Like the Wolf " and " Rio " , which debuted at number ninety @-@ eight . " Fighter " did not enter the Billboard Hot 100 , but peaked at number two on the Bubbling Under Hot 100 Singles chart . Three songs charted on the Billboard Canadian Hot 100 : " Somebody That I Used to Know " debuted at number twenty @-@ one , " Hungry Like the Wolf / Rio " at number eighty @-@ one , and " Fighter " at number eighty @-@ five . 
