Music by Gail Sky King
Lyrics by Josh Selig
Date 1997
Publisher Sesame Street Inc.
First Episode 3705

"U Song" is sung by Ron Marshall over footage of children playing with the letter U. It praises U as a friend.

The exact same melody, with different lyrics (also by Selig and also sung by Marshall), was used with different film footage for the letters L and S, as well as the number 2.