The Fourth of July is, undoubtedly, one of summer's biggest shopping weekends full of great deals, but these deals aren't reserved just for patio furniture and grills. This holiday is also one of the best times to stock up on beauty favorites. Whether you've had your eye on a new hair tool, need to replenish your everyday skin-care staples or have been waiting for the perfect excuse to splurge on luxury makeup, this weekend's sales offer up some major savings.