Step 11: Using the same technique, draw the right arm. The half circle for Princess Bubblegum's sleeve should be touching the main rectangle shape. Add the bumps for the frills, then thicken up the guide line for her arm. Don’t forget the curved lines for Princess Bubblegum's fingers!
Step 12: Use the initial rectangle shape as a guide to draw the rest of Princess Bubblegum's dress. Use a curved line to form the top part of her body and give her shape. Notice that the bottom part of her dress is wider than the original rectangle. Draw a couple of bumps for Princess Bubblegum's neckline and some lines for her belt.
Step 13: Draw Princess Bubblegum's crown on top of her head. The crown is basically a horizontal line and a vertical line. Draw a circle on top of the vertical line to indicate the jewel.
Step 14: Use the initial line as a guide to draw the rest of Princess Bubblegum's hair. Just darken the guide and add a few bumps to the bottom part of her hair.
Step 15: That’s it! You now have a nice sketch of Princess Bubblegum from Cartoon Network's Adventure Time. You can stop at this quick drawing for a rough, sketchy look or go for a more finished look by continuing to the step below.