One Direction's video for 'Best Song Ever' may be their best video ever.

The video, which debuts tomorrow (July 22), is shaping up to be hilarious. The final teaser clip gives a bit of a behind-the-scenes glance at how they all got into character!

Louis Tomlinson had to shave his arm, we see Zayn Malik's bra, Niall Horan yells at himself, Harry Styles dances and Liam Payne poses in his bizarre hairpiece and tennis getup. Directioners, are you excited?!