Watch One Direction Sing a Love Song to the Letter "U" on 'Sesame Street'

One Direction Sesame Street - H 2014

One Direction Sesame Street - H 2014

"That's what makes 'U' so useful"

The letter "U" has never felt as much love as it does right now. The boys of One Direction visited Sesame Street again to sing a song all about the lovely letter and compliment it for starting words like "ukulele" and "udon."

The singers changed the words to "What Makes You Beautiful" and sang about the usefulness of "u." Clever wordplay, guys. Watch below for a totally u-nique experience.

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