Through 4/15, e.l.f. Cosmetics is offering a secret discount code of 20%-50% off your entire purchase, with a maximum discount of $10. To reveal your secret discount, click the banner that says "discover your refund" on the homepage, and enter the code at checkout. We just tried three times and got a 50% off discount code every time! A best bet with the 50% off code is this 83 Piece Essential Makeup Collection, which drops from $35 to $25 to $15 with our secret code. Shipping adds $6.95 and there is no sales tax (except NY).