I know It's been awhile since the last time I uploaded a song from the show "Phineas and Ferb" but I've been waiting 7 years for the moment that the cutest, dumbest, genious of Danville realizes his feelings to Isabella :'3, so I made an exception!!
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"What Might Have Been" is a duet between Phineas and Isabella in the Season 4 Phineas and Ferb...