The Grand River Singers are asked to make an audition tape for a potential appearance at the Mall of America. The group also performs a flash mob at a local grocery store.

It's Oktoberfest time in La Crosse, Wisconsin and GRS don their lederhosen to hit the parade route and perform for a beer-swilling crowd of thousands. Rob and Tim panic as audio problems arise just as they approach the judges.

GRS prepare for their biggest performance ever at the Mall of America in Minneapolis. Emotions run high as they realize this might be the last time they perform together as a cast before they have to audition all over again.