Though it's an amusing diversionary tactic they use to win the game, the McKinley football team's rendition of "Single Ladies" would most likely result in a loss instead: an antic like that would be penalized five yards for delay of game, costing them not only an advantageous field position, but precious time off the play clock.
During the football game, Puck was called out as "Left Tackle" by the opposing defensive lineman trash talking. Puck goes on to catch the game winning touchdown pass, but an offensive tackle is not an eligible receiver unless the referee is told before the play that he wishes to become an eligible receiver. Puck did not do this, so the touchdown should not have counted.