4x02 song spoiler
New Directions performs in the gym (I assume at some kind of assembly but not positive?). They are supposed to be kicking ass and showing off their new-found popularity, singing to an eager audience. Except Brittany has gone the Britney route: sloppy, eating Cheetos, etc. She sings Gimme More and they end up getting booed by the school.
Alfonso Gomez-Rejon was directing.