- Chunk Squarey (from Rolie Polie Olie) as Jackman Wolf
- Homestar Runner (from Homestar Runner) as Big Bird
- Big Mouth (from Peg + Cat) as Cookie Monster
- The Cat in the Hat (from The Wubbulous World of Dr. Seuss) as Telly Monster
- Richard (from Peg + Cat) as Elmo
- Peg (from Peg + Cat) as Zoe
- The Grinch (from The Wubbulous World of Dr. Seuss) as Oscar the Grouch
- The Ferocious Beast (from Maggie and the Ferocious Beast) as Snuffy
- Clover (from Sofia the First) as Hoots the Owl
- Phineas Flynn (from Phineas and Ferb) as Bert
- Ferb Fletcher (from Phineas and Ferb) as Ernie
- Dr. Teeth (from The Muppets) as Count von Count
- Sofia (from Sofia the First) as Rosita
- Izzy (from Jake and the Never Land Pirates) as Prairie Dawn
Chunk Squarey: (laughing) Now we're getting to the heart of things. (laughing) And speaking of heart, here's a sweet heart lovely song that gets to the heart and soul of rock and roll.
New York, New York, is everything they say
And no place that I'd rather be
Where else can you do a half a million things
All at a quarter to three
When they play their music, ooh that modern music
They like it with a lot of style
But it's still that same old back beat rhythm
That really, really drives 'em wild
They say the heart of rock and roll is still beating
And from what I've seen I believe 'em
Now the old boy may be barely breathing
But the heart of rock and roll, heart of rock and roll is still beating.
Phineas Flynn: Heart of what?
The Cat in the Hat: Wow! Look at him go!
Sofia: Ay, ay, ay. Mucho bien.
Izzy: Boy, does this beat my heart or what?
The Cat in the Hat: Yeah!
Izzy: I would to speak...