'Best Prom Ever' - Season 1, Episode 20
Lily, Barney and Robin attend a high school prom in the hopes of finding a band for Lily and Marshall's wedding.
Air Date: May 1st 2006.
Barney: We'll just sneak in.
Marshall: We are not sneaking in to a high school prom.
Lily: Yes we are, it's the only way.
Ted: You are getting on board with Barney's idea? Man, you really have snapped.
Marshall: It'll be cool. I'll tell you what, we'll make a game out of it. First one to stuff a hundred invitations gets a big prize.
Ted: Do I look like I'm four? *Pause* All right, what kind of prize are we talking about?
Lily: (Waking up suddenly) Crap! Band! We forgot a band! It's just gonna be silence and then people chewing.
Marshall: Awww. They grow up into skanks so fast, donít they Ted?
Marshall: It is on! It is on like the former Soviet Republic of Azerbaijan.