Instagram makeup artist star and self-proclaimed "dewy dumpling" Nam Vo loves the Bobbi Brown Concealer Blending Brush (£25.50) so much that she owns 10. No, really. "It's basically for everything," she said. She uses it on the eyes to press glitter shadow onto the centre of the lids. She uses it to press liquid lipstick onto the mouth and gloss onto the cheekbones. And she, unsurprisingly, uses it to put on concealer, too.