The halo is an effect you conjure up on your eyelids in a slightly different style from traditional eyeshadow. Instead of doing it the classic way, with the lightest eyeshadow in the inner corner and the darkest eyeshadow in the outer corner, you apply the dark eyeshadow to the inner and outer corners and the lightest shadow to the centre of the eyelid. It lights your eyes up beautifully, and also gives you a truly dramatic look. So how do you do it?