When you buy any beauty product — be it for your hair, face, or body — you expect it to work. Duh! But there are some items that have truly stood the test of time and become cult classics. These are products that give you noticeable results; they work ridiculously well. Thankfully, Ulta carries many of the things we're talking about. Whether you need an excellent inky black eyeliner or a conditioner that will leave you with incredible shine, there's a product for that. We rounded up the ultimate must-have items you need for your beauty arsenal. Take a look at the essentials and invest in them for game-changing results. You won't believe you have missed out for so long.