When you've spent the night before partying like a rock star and it's time to head back into the office, hiding a hangover becomes a top priority.

Taking back a couple glasses of your favorite cocktail, wine or beer can lead to dehydrated and irritated skin -- and once you add an excruciating migraine to the mix, worry lines are just a moan away.

Makeup artist and cosmetics creator Lisa Sim offers pro tips in the video above on how to hide a hangover. Fake it until you make it with a yellow-based foundation (to absorb the redness of broken capillaries), bronzer, concealer, blush, eyeliner, lip stain and facial mist, and your boss and colleagues would have no clue you got less than eight hours of sleep last night.

Watch the video above for Sim's step-by-step guide on hiding a hangover. You can thank us later!