Uploaded June 2015 | Updated September 2026, 3 weeks ago
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Serious Fun (aka One Last Day of Summer) is a pop rock song sung by Phineas, with a cameo from Baljeet, in "Last Day of Summer" while they go through Danville meeting the gang and trying Phineas and Ferb's new hoverboard invention.
Follow PhineasFan11 on Twitter: twitter.com/Fan11Phineas
Serious Fun (aka One Last Day of Summer) is a pop rock song sung by Phineas, with a cameo from Baljeet, in "Last Day of Summer" while they go through Danville meeting the gang and trying Phineas and Ferb's new hoverboard invention.
![Phineas and Ferb Star Wars - Darthenshmirtz and Darth Vader [CLIP]](https://i.ytimg.com/vi/Et4mf7WHH4M/mqdefault.jpg "Phineas and Ferb Star Wars - Darthenshmirtz and Darth Vader [CLIP]
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Clip of Darth Vader ignoring Darthenshmirtz.")
![Phineas and Ferb The OWCA Files Theme [REPRISE]](https://i.ytimg.com/vi/F6QtfFm3uxg/mqdefault.jpg "Phineas and Ferb The OWCA Files Theme [REPRISE]
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The reprise version of the theme of the standalone special, The OWCA Files which serves as the LAST ever song of the overall series.")
![Coming Soon to PhineasFan11 2015 [FINAL EDITION]](https://i.ytimg.com/vi/G4DZZ5x7l4g/mqdefault.jpg "Coming Soon to PhineasFan11 2015 [FINAL EDITION]
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Heres the last edition of the annual series which showcases what is coming next to this channel!
P.S. The LAST video of PhineasFan11 will be uploaded around September or October (depending on my schedule).
NO COPYRIGHT INFRINGEMENT INTENDED.")
![Phineas and Ferb - Phineas Reads Isabellas Letter [CLIP]](https://i.ytimg.com/vi/HBvfQw53ngY/mqdefault.jpg "Phineas and Ferb - Phineas Reads Isabellas Letter [CLIP]
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[SPOILERS] Clip from the episode, Operation Crumb Cake of how Isabella nearly revealed her romantic feelings towards Phineas through her love letter but got wasted thanks to Doofenshmirtz Unretrograde-inator")
![Phineas and Ferb - What Might Have Been [SOUNDTRACK] Lyrics](https://i.ytimg.com/vi/KihEcBeGI5Y/mqdefault.jpg "Phineas and Ferb - What Might Have Been [SOUNDTRACK] Lyrics
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To watch all songs from the Last Day of Summer soundtrack, click here: https://drive.google.com/open?id=0B7OtZkJPc3sNMm5LR2I1VzdKOGs
Soundtrack version (and last track of the album) of the song from the special, Act Your Age.")
![Phineas and Ferb Star Wars - Phineas Rescues Candace [CLIP]](https://i.ytimg.com/vi/M3dfQ8kpMxc/mqdefault.jpg "Phineas and Ferb Star Wars - Phineas Rescues Candace [CLIP]
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Clip of Rebel Phineas rescuing Stormtrooper Candace from slipping off a ledge.")
