Princess Robot Bubblegum Earth Magic Understands Eating Unavailable Mentioned in the episode list on princessrobotbubblegum.
However, the two always seem to make up and are back to normal in the end.
After the Lich is defeated, Ice King accidentally drops the princess into the Well of Power, corrupting her.
She seems quite stern, even motherly, when necessary, though.
When she finally came, he reveals that this time he wants to marry Bubblegum herself.
Later, she tells the Ice King that even if she actually said that, he still would not be the only person in Ooo because she is still there and starts making out with her own hand, showing she'd rather be in love with herself than with Ice King and that she still has a strong distaste for him.