Now we've been giving you gals all the 411 on the best sunscreens and how to keep skin safe in the summer sun, but in case you need a seasonal skincare refresher, check out the latest video from one of our favorite beauty gurus, Michelle Phan.

Do you know the difference between UVA and UVB rays? Are you wearing an efficient sunscreen? If you're stumped by these beauty basics, this video will guide you along the way on to finding your ultimate protector from the sun. Phan uses Algenist Ultra Lightweight UV Defense Fluid SPF 50, Coola Sunscreen SPF 30 Cucumber Matte Finish, and 3LAB 'Perfect' Sunscreen SPF 55 PA+++. Check Michelle's informative video out and let us know your sunny thoughts in the comments below!