Powder. Some hate it, some love it - my oily skin needs it. For years I have been a royal lover of Rimmel Stay Matte. I first discovered it in the late years of high school (over 6 years ago) and have not switched to anything else. It works well with every single foundation that I have ever owned but last year, it was time to venture out and I ended up finding 3 additions that have blown me away and they're all under £10!
