Where Did We Go Wrong

Phineas: How could we be naughty when I thought we'd been so nice.

Isabella: Could we have been blinded to some little hidden vice?

Baljeet: Did our visions of sugarplums not dance like they should?

Phineas: I'm rackin' my brain here, I really thought we were good.

Phineas, Baljeet and Isabella: I know you got that list, and I know you check it twice.
But could you check it again because it seems to me we were all pretty nice.

Phineas: All except for Buford, but he's got that last minute reprieve theory.

Buford: It's going to work. You watch.

Phineas, Baljeet, Isabella, Jeremy and Candace: Where did we go wrong? Please tell me.
Where did we go wrong?
Where did we go, won't somebody tell me?
Where did we go wrong?