The "Not Feelin' Good Song" is a song Jake sings to Princess Bubblegum in "Mortal Recoil" in an attempt to make her feel better after her ordeal with the Lich. He uses a microphone with a little amplifier and shapes his belly (and later his bottom) into a pair of bongos to drum on. The song angers Princess Bubblegum (who was possessed by the Lich at the time), prompting her to set the room on fire and wilt all the flowers Finn and Jake brought her.
| Princess, you're not feeling good.|
You're not feeling like a princess should.
And if you wanna get better fast,
Check out my cute little booty dance.