Serendipity Musical Number

What's that word for when you find something That you weren't looking for Like you find a twenty dollar bill When you were trying to find your keys There's a word for what that is I can't seem to think of it But its what we have right now It is Definite-ah-ly A word! What is that word? I'm being serious! What is that word? I keep thinking of other words But not the word that I'm looking for And that's like the definition of the word What is that word? Does it maybe start with S I think I know the word you mean It has a lot of syllables It sounds like Serenity That's close! What is that word? It's like serenity but not What is that word? I keep thinking of other words But not the word that I'm looking for And that's like the definition of the word What is that word? That word (That word) What is that word? (What is that word?) This is going to bother me all night What is that word? I keep thinking of other words But not the word that I'm looking for And that's like the definition of the word What is that word?