Drawing a cartoon look cheerleader

Start by applying a nice gradient to the background. Create a circle using elliptical shape tool.

Press Ctrl+T. Right Click and select Warp. Adjust the nodes to get the shape as shown.

Create a ellipse. Press Ctrl+Alt+G to create a clipping mask.

Similarly create another one. This'll create hair for the girl.

Create some small ellipses to create eyes of the girl.