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Carpe Diem

Originally performed by
Composer
Lyrics
Performer(s)	Phineas Flynn, Isabella, and other singers(episode) Phineas Flynn(album)
Length	1:43 (episode) 1:46 (album)
Films
Shows	Phineas and Ferb
Attractions		Video games
Albums	Phineas and Ferb: Across the 1st and 2nd Dimensions
Preceded by	Rollercoaster
Followed by	Candace Party

[Source]

Carpe Diem is the closing song in "Rollercoaster: The Musical!"

Lyrics

Phineas: Well we hope you all enjoyed the show

Hope it was not anti-climatic

Now there's something we want you to know

And we don't want to sound didactic

Phineas and entire cast: But if there's one thing we can say

I know it sounds a bit cliché

There's no such thing

As just an ordinary day

And you don't have to build a roller coaster

To find your own way to make the most of

These days of summer

And dance to the beat of a different drummer

Just grab those opportunities when you see 'em

'Cause every day's a brand new day, you gotta Carpe Diem

Fireside Girls: Ooh-ooh-ooh-ooh....

Kenny Ortega interruption

Entire cast: And you don't have to build a roller coaster

To find your own way to make the most of

Every minute

No more waiting for the right time, you're in it

Just grab those opportunities when you see 'em

'Cause every day's a brand new day, baby, carpe diem

Aliens of Mars: Ooh-ooh-ooh-ooh....

Santa Claus, Blay'n, Clewn't, Agents: Ooh

Danny: Every day's a brand new day, baby, carpe diem

Ba-dink-a-dinks: Ooh-ooh-ooh-ooh....

Professor Destructicon, The Regurgitator and entire cast: Every day's a brand new day

Haney's Cow Emporium and entire cast: Baby, carpe diem

Agents: Ooh-ooh-ooh-ooh....

All: Every day's a brand new day

Carpe diem (Perry chatters)

Background Information

A demo was posted on SoundCloud.
Phineas and Ferb and other characters (besides Dr. Doofenshmirtz) are dancing next to Perry the Platypus as Agent P for about 58 seconds in the song. However, none of the characters notice that Perry is a secret agent.
The sign in the background that says "ROLLERCOASTER THE MUSICAL" is the same format as the "HIGH SCHOOL MUSICAL" sign that is seen at the end of High School Musical 3 movie during the end of the song "High School Musical". Also, Candace is standing in the same place that her voice actress, Ashley Tisdale stands at the end of High School Musical 3. In addition, Kenny Ortega was also the choreographer for High School Musical.
Some dancers from "Phineas and Ferb Summer Belongs to You!" appear briefly in the song.
In the Japanese version, there is an extra syllable in the title because of the hiragana/katakana Japanese alphabets. This version is called/written as Kāpe Dīemu in Japanese rōmaji, and written as カーペディーエム (pronounced the same) in katakana.
At one point of the song, the Fireside Girls, Baljeet, Buford and Isabella are seen doing the moonwalk, similar to what Jenny and Stacy do a few episodes later in Candace Party in the episode "Candace Gets Busted".
This song was included in the Phineas and Ferb: Across the 1st and 2nd Dimensions soundtrack.
The line "I know it sounds a bit cliché" may be a reference to earlier in the episode in the song Hey Ferb, when Phineas sings a very similar line: "Though it might sound just a bit cliché".
The interruption with Kenny Ortega isn't in the album version.

Errors

Isabella's voice can be heard singing the line "There's no such thing as just an ordinary day"; however, when she comes in later on, her mouth is closed.
When Phineas says "didactic," the space between his legs is white.
When the Fireside Girls appear to sing their part, they don't move their lips until the second "ooh".
At the end of the song in a promotional image, four floating mouths are seen.
Holly is not shown until the end.
When Phineas says "we" (in "Now there's something we want you to know and we dont want to sound didactic.") Phineas's legs are invisible.

Continuity

Many characters from previous episodes make cameos during the song: A bystander from S.I.M.P. (Squirrels In My Pants), Grandma and Grandpa Fletcher, Vivian, Gunther the Goat, Gunther Goat Cheese's animatronic animals, Coltrane, Grandma and Grandpa Flynn, Vanessa Doofenshmirtz, Kenny Ortega, dancers from Charmed Life, dancers from Baliwood, Only Son, Doofenshmirtz's parents, Doofenshmirtz's neighbor Kenny, Dr. Jekyll Doofenshmirtz, the Platypus monster, Pinhead Pierre, Captain Implausible, Balloony in his fight suit, Meap, Mitch, the "robot guy" from "Picture This", Mitch's army of robots, the brobots, the -inator from "What Do It Do?", the stable and the cows from Ain't No Kiddie Ride, the whale from "Raging Bully", the Farmer and Farmer's Wife, Doonkleberry bats, elephants from Baliwood, Django Brown, the mummy from My Undead Mummy, Marty the Rabbit Boy, Jerry the Platypus, Ben Baxter, the aliens of Mars, Santa Claus and his reindeer, Blay'n, Clewn't, some agents from the O.W.C.A., Stacey's cousins (in anime) from J-Pop (Welcome to Tokyo), a young Love Handel, three Ba-dink-a-dinks, Nosey, Mishti Patel, Kevin Destructicon, The Regurgitator, Haney, dinosaurs that look like Candace from "It's About Time!", the giant Star-nosed Mole, the Talking Zebra, Doofenshmirtz's failed copy, Professor Poofenplotz, Pinky the Chihuahua, Peter the Panda, Dave and Rick, Charlene Doofenshmirtz, Sam (the boyfriend of Charlene who works at Charitable Charities), Roger Doofenshmirtz, Doofenshmirtz's unnamed ex-girlfriend, Irving, Suzy Johnson, Shimmy Jimmy, the Goozim, the Gorilla in the cake from "Candace Loses Her Head", the Unnamed dream Sergeant, Biffany Van Stomm, Dr. Gevaarlijk, two cameramen, the elf creatures from Wizard of Odd, Wendy (from "Unfair Science Fair") and the Giant Floating Baby Head.
- Strangely, Albert, Melissa, The Ballpit Kid, Johnny, Steve, Mechanical Bull, Gelatin Monster, Klimpaloon, Uncle Sabu, T-Rex from "It's About Time!", Planty the Potted Plant, Charles Pipping IV, the unknown blond Fireside Girl, Khaka Peu Peu, Thaddeus and Thor, Chad, Norm, Melanie, Morty Williams, Rodney, Wendy Stinglehopper, and Olga and Chicago Joe were not in the song at any point among those who had one or more speaking lines in the series. Norm, however was seen as a cameo in Back in Gimmelshtump.
For a brief moment, Phineas and Ferb are shown in front of the background from Izzy's Got the Frizzies.
The Ba-dink-a-dinks are shown dancing in front of the corn field where Baljeet (the "nerd crow") was singing in I Wish I Was Cool ("Wizard of Odd").
Second episode ended in a song with lots of people in the backyard. ("Phineas and Ferb Summer Belongs to You!")
When Sherman was playing the drums with his band, he had gray hair, possibly because the band just worn their old clothes and the same hairstyle.
The dancers from Baliwood use the same background as that song.
This is the second song that refers to a roller coaster ("Rollercoaster").
Perry does not chitter in the album version of the song.