Mop's Song (titled as "Good Golly, I'm Mop!" by fans) is a song about Mop that plays during several Season 1 episodes as well as "The Mop Show."
Lyrics
Bob the Ball: Who's that looking fine and fancy free
Mr. String: She will never be topped
Little Cup: Mop!
Doris the Door: Who's that sweeter than a honey bee
All: Good Golly, It's Mop!
Mop: I can sing my songs in any key
While I'm doing the hop
Plush: Whee!
Mop: I can paint and recite poetry
Good Golly, I'm Mop!
Mr. String: Look at her eyes, wise, and so believing
Doris the Door: She's fair
Mr. String: Rare!
Bob the Ball: And very cool
Mr. String: She's Quick
Doris the Door: Slick
All: And achieving
Mop: I'm nobody's fool, Bop-bop-bop, Mop-mop-shoo wadda wadda
Little Cup & Bob the Ball: Bop-bop-bop, Mop-mop-shoo wadda wadda
All: Bop-bop-bop, Mop-mop-shoo wadda wadda wa
Who can be just what she wants to be
Always comes out on top
Little Cup: Mop!
All: Who can make a day that's gloomy just stop
Mr. String: It's plain to see
Bob the Ball: It's gotta be
Mop: Bop-bop-bop, Mop-mop-shoo wadda wadda bop Good Golly I'm
All: She's Mop!