We've broken down the exact brushes you need and how to actually use them  

Have you ever looked at a make-up brush and known immediately that you needed it ASAP in your life (guilty x 100). But only to soon realise you have no idea what the delightful, soft- bristled tool is actually used for? Allow us to help. We spoke to YSL's director of Artistry, Ross Andrewartha, to give us the 411 when it comes to make-up tools. Click through the gallery to see what he has to say:

How to use every makeup brush in your kit