The wager is on. Barney shakes hands with Lily here and agrees to wear Marshall's ducky tie if he loses.
The gang is suited up here and ready to go. It's a classic promotional shot of the HIMYM cast.

How I Met Your Mother Season 7 Episode 3 Quotes

Robin: Lily what on Earth is going on with your cans?
Lily: Oh these old thangs? I got my pregnancy boobs!

Duck duck gross!