The case: Aguilera is charged with applying a multi-hued eyeshadow look, not unlike Rihanna’s eyeshadow looks here. But the crime occurs with her failure to blend the shadows at all. The result: clearly defined bands of color, a makeup artists’ worst nightmare.

The punishment: Three hours organizing Sephora’s makeup brush display as a reminder to use them.

The lesson: Blend, people, blend! And when you think you’re done blending, blend some more. Your face will thank you.