The arrival of spring makes us want to throw open the windows and clear out our homes. That includes sorting through the multitudes of face masks, eyeshadows and makeup brushes we stored away all winter like chipmunks. But then summer rolls around, it has a way of sparking the need to stock up again on all things dewy, shimmery and basically anything with built-in SPF. Here, 18 best-selling summer beauty items to pick up from Sephora ASAP.