"All Warmed Up Inside" is a song Jake sings in "Incendium" to win the heart of Flame Princess for Finn. He refers to it as his second gift to the princess. The tune is very similar to "All Gummed Up Inside," which is sung by Finn, so Jake's claim that it is by Finn is not wholly untrue. Jake played it with the Fire Guitar.
| Oh, Flame Princess,|
I think you're rad.
I really wanna kiss you,
Right in front of your dad.
| 'Cause I think you're great,|
I wanna be your mate,
or maybe go on a date.
| 'Cause it feels like there's a fire inside my body,|
Like there's a fire inside my heart.
It's like this fire is gonna consume me,
If I keep waiting for this thing to start.
| Ohh, I feel like I'm all warmed up inside,|
I feel all warmed up inside,
I feel all warmed up insi-i-i-i-i-i-ide.
- The lyrics of the first verse of Rebecca Sugar's demo are different from the final version:
Oh, Flame Princess,
I like your dress.
You're like a beautiful treasure,
I wanna open your chest.
- Flame King's line after the song originally was "A fire inside my body? That's pornographic!" instead of "I am disgusted!"
- To add to the parallels, Flame Princess sighs happily at the end of the song, just as Finn sighs unhappily at the end of "All Gummed Up Inside."