Follow PhineasFan11 on Twitter: https://twitter.com/Fan11Phineas Serious Fun (aka One Last Day of Summer) is a pop rock song sung by Phineas, with a …
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![Energic, female, french, pop music, Creative Commons [Law' – Les files d'attente] [CCFM Music]](https://yzhood.com/wp-content/uploads/2020/11/1606677683_maxresdefault.jpg){kind=small}
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Phineas and Ferb Last Day of Summer – Serious Fun (aka One Last Day of Summer) Lyrics
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