What Makes R5 'Smile'? Find Out In This Exclusive Behind-The-Scenes Video

Also, why did they have to learn the song backwards?

Get ready to "Smile" as pop rock band R5 takes you behind-the-scenes of their new music video, premiering Tuesday (December 23) at R5.MTV.com.

Before it drops, take a gander at the exclusive behind-the-scenes clip below to find out more about the video's concept, what makes the band smile and why, oh why, they had to learn the song backwards for the shoot. Say what?

This little vid should tide us over until 2015, when we hope the Lynch family band (plus Ellington Ratliff) will finally release their "darker," "in your face" followup to 2013's Louder.