Will battles his lack of confidence when Rachel questions his ability to lead the glee club. He forms the Acafellas, an all-male acapella vocal group, as an outlet for his singing talent. Boy band alert! (Wonder if he'll start dating Jessica Simpson...) Yet Will spends more time building his own confidence than that of the glee club.

In Will's absence, the glee club decides to hire well-known choreographer Dakota Stanley to help coach them to Nationals. Yet his style doesn't quite fit in with New Directions. In other words, he's a full-on jerk.

With prodding from the Cheerios, Mercedes mistakes BFF Kurt's friendliness as something more. She develops a crush on him, but her feelings aren't reciprocated. Hmm... we wonder why?!

When the Acafellas perform for the PTA meeting, they get a surprise visit backstage from singing sensation Josh Groban, who was invited by his biggest fan, Sandy. Yet Groban isn't there as to hire the Acafellas for his tour as Sandy has hinted — he only wants to serve stalker Sandy with a restraining order. Sandy, you have been served! Not that we can really blame Sandy. Have you heard Josh's voice?

Terri helps Will realize his passion is not performing, but mentoring students. There go his chances with Jessica Simpson!

Music:

1. Bust Your Windows — Jazmine Sullivan (2008)/ Album: Fearless
Mercedes Jones
2. Mercy — Duffy (2008)/ Album: Rockferry
Acafellas
3. This is How We Do It — Montell Jordan (1995)/ Album: This Is How We Do It
Acafellas
4. Poison — Bell Biv DeVoe (1990)/ Album: Poison
Acafellas
5. La Camisa Negra — Juanes (2004)/ Album: Mi Sangre
Acafellas
6. I Wanna Sex You Up — Color Me Badd (1991)/ Album: C.M.B.
Acafellas