Friday is hands down the best day of the work week... mostly because it signals the end of it. But for beauty enthusiasts, Thursday is about to become a very close second: Sephora debuted its brand-new Weekly Wow sale today, so you might want to consider getting out of bed 15 minutes earlier every Thursday just so you can shop the deals before they're gone — or, at the very least, not hitting the snooze button more than once.