1) In Princess Cookie, she visited the 캔디 Orphanage. Baby Snaps was still a kid there, and Bubblegum looked 18. It was the past. While Cookie has grown physically, PB still remains the same.
2) In the promo art for Burning Low, Flame Princess seems to very young, like 5 years old. While Peebles in 다음 to the lantern, looking 18 years old.
3) In The Suitor, the oldest suitor said he had been waiting for PB for 300 years. Indicating that she has lived for 300+ years. I think that it is because of 캔디 Biomass that makes her live.
(Back where we left off)
Flame Princess: Well...
Finn: I got to go
Flame Princess: Finn wait!
Princess Bubblegum: So 당신 found out huh
Flame Princess: You! (Has a fireball ready)
Princess Bubblegum: I'm not here to strap 당신 up
Flame Princess: Then just run away like the others (Looking sad)
Princess Bubblegum: Finn isn't going to confess right away
Flame Princess: Then when tell me when!
Princess Bubblegum: Time will tell 당신 the answer, well I have to get going the 캔디 citizens are going to be protected on their own, Morrow! (The bird takes her away)
Flame Princess: Oh Finn tell me please
(She walks to the treehouse and Finn opens the door)
Part 3 coming soon! Keep watch citizens ^-^
Flame Princess: Well...
Finn: I got to go
Flame Princess: Finn wait!
Princess Bubblegum: So 당신 found out huh
Flame Princess: You! (Has a fireball ready)
Princess Bubblegum: I'm not here to strap 당신 up
Flame Princess: Then just run away like the others (Looking sad)
Princess Bubblegum: Finn isn't going to confess right away
Flame Princess: Then when tell me when!
Princess Bubblegum: Time will tell 당신 the answer, well I have to get going the 캔디 citizens are going to be protected on their own, Morrow! (The bird takes her away)
Flame Princess: Oh Finn tell me please
(She walks to the treehouse and Finn opens the door)
Part 3 coming soon! Keep watch citizens ^-^