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| Music by | Sam Pottle |
| Lyrics by | David Axlerod |
| First | Episode 0980 |
"Three is So Curvy" is a Sesame Street song performed by Olivia and Crumbs Unlimited.
Olivia appears as a disco dancer on a limbo set dressed with lights flashing the number three. She sings about how 3 is so curvy and tall, and ultimately that it's her favorite number of them all. She points out that without it, you'd only have Two Blind Mice, Four Little Pigs, and Goldilocks and the Two Bears.