My Little Phineas and Ferb: City of Love

I know what you are all thinking; this isn't rubber bands rubber balls? Well do not worry I am still making it. It's just that my sister's birthday is tomorrow and this is my present for her, making the song she has been wanting me to make ever since I agreed to do this set. So I'm putting this song up early By the way doesn't fluttershy work perfectly as Isabella? P.S. I do not own my little pony or phineas and ferb