Isabella: I'm just the curious girl 'cross the way
Every day I come over, and here's what I say
What'cha doin', what'cha doin'?
What's the day's activity?
What'cha doin', what'cha doin'?
By any chance, could it include me?
What'cha doin'?(Fireside Girls:What'cha doin'?) What'cha doin'?
Isabella and Fireside Girls: I don't mean to disturb
Isabella: What'cha doin',(What'cha doin'?) what'cha doin'?
Isabella and Fireside Girls: You know it's not really directed at Ferb
When I say-ay-ay-ay-ay
What'cha doin'?
Isabella: Oh, don't you know, Phineas, you have no idea
That every day I'm just dyin' to see ya?
And say...
Isabella: What'cha doin', (What'cha doin'?)what'cha doin'?
Isabella and Fireside Girls: I really wanna know
Isabella: What'cha doin',(What'cha doin'?) what'cha doin'?
Isabella: Can I be part of the show?
Isabella and Fireside Girls: When I say-ay-ay-ay-ay
What'cha doin'?