Princess Bubblegum

Princess Bonnibel Bubblegum of the Candy Kingdom is a fictional character in the Adventure Time animated series. She is a Gum Golem, comparable to the inhabitants of the Candy Kingdom, who are all composed of types of desserts and candies. She used to rule the Candy Kingdom, but in the Season 6 episode "Hot Diggity Doom" (the first part of the season's finale), an election was held and she lost to the King of Ooo by a landslide. As a result, she no longer rules the Candy Kingdom and the King of Ooo replaces her as the new ruler. Her proficiency in science and fluency in Korean are a testament to her high intelligence.

All the Little People (S05,E05)
There was a scene where the little Princess Bubblegum was working out and show her hard abs.