Under Water Love is an episode of Adventure Time.
The Ice King captures Princess Bubblegum, the Slime Princess, the Flame Princess and the Water Princess. The Flame Princesses flame melts the Ice King into water. Now he is H2O, he decides to date the Water Princess but she likes Finn instead. The Ice King then makes a plan to freeze her so she can be his bride but Finn and Jake save the day by rescuing the Water Princess. The Slime Princess then tries to escape but then the Ice King looks at the screen sneakily as a light bulb appears above his head.