One Direction sing on Sesame Street

One Direction are the latest celebs to stop by Sesame Street!

You may have seen the video of them singing about the letter "U' from back in January. Now, there's a new one of Liam and Harry singing the alphabet with Bert. 

Watch both videos below!

Sesame Street: One Direction What Makes "U" Useful (What Makes You Beautiful Parody)

Sesame Street: One Direction and Bert Sing the Alphabet