When's the last time you gave your makeup bag a thorough clean out? If it's been few months, or -- gulp -- years, there's a good chance more than a few of your products have expired.
To make sure the cosmetics you apply are safe and effective, celebrity makeup artist Jamie Greenberg says to use your senses. "You need to smell your makeup," Greenberg says. If something's off, your nose knows -- and that means it's time to toss.