One Direction have made it. Official. How do we know? Because they're on the street. Sesame Street.
The timeless children's TV show has played host to luminaries from Beyonce to Becks, and now it's the turn of the Brit boyband to join in the fun. But they had to sing for their supper, adapting one of their biggest hits to sing about the letter 'U'. Do you recognise it WATCH them in action below...