Sheet masks are perhaps 2015's greatest gift to beauty trends. If you don't currently have a stockpile of sheet masks cleverly hidden from your roommates, we fear you're missing out on a golden beauty opportunity. Your face has never felt better than post-sheet mask, I can assure you. (Okay, maybe a fancy facial is better, but this is way more affordable). For a few bucks, you get 20 luxurious minutes of skin pampering that will quickly become an addiction. Feed the addiction below!