This Glee photo contains
bridesmaid and maid of honor.
There might also be
dinner dress, dinner gown, formal, evening gown, cocktail dress, sheath, strapless, and bare shoulders.
Glee 6x04 "The Hurt Locker, Part 1" - Rachel tries to make a deal with Will, so that his glee club purposefully underperforms at their invitational. Meanwhile, Sue is busy meddling and hypnotizes Sam into making a move on Rachel to throw her off