|Music by||Russell Velazquez|
|Lyrics by||Annie Evans and Belinda Ward|
|Publisher||Sesame Street Inc.|
"The Addition Expedition" is a song performed by LL Cool J and Elmo. They go and look for things to add. They end up adding two chickens and a penguin, two frogs and two rabbits (modified Billy and Benny puppets) and Elmo adds himself and LL Cool J to make "two friends".