While Phineas and Ferb are walking down the street, they heard a certain Italian man with a unique haircurl singing a certain song that is catchy to the ears. Another man, this time a blue-eyed German, interrupted him. This gave Phineas an idea.
"Ferb, I know what we're gonna do today. Let us make our own version of Hatafutte Parade!"
So at home, they are practicing several songs, with Candace trying to bust them. However, she found that the tune is a little catchy and decided to make her own. Isabella, on the other hand, made a separate version from the boys.