The office holiday party is a great opportunity to show your co-workers a more glamorous side of yourself, but there's a fine line between a "do" and an "over-do."

Makeup artist Gita Bass, who has created eye-catching looks for celebrities such as Eliza Dushku, Mila Kunis and Keira Knightly, offers her advice for flawless holiday party looks:

DON'T go overboard with the eye makeup: The key is to look great but still professional and approachable. "Instead of a dark, edgy smoky eye, choose brown, slate or plum for a softer look, and make sure to blend well so there are no harsh lines," Bass suggests. "Keep the rest of the face bare to avoid looking overdone."

DO opt for a red pout: A red lip is always appropriate when paired with soft makeup on the rest of the face. This makes your look fun and festive, yet classic, says Bass. "Make sure to powder the edges of your lips to prevent any bleeding and remember to check your teeth after you apply!

DON'T look washed out: Summer may be long gone, but bronzer is a great way to achieve a healthy glow all year round. "During the winter months, it's best to choose a bronzer that is more matte and less shimmery for a more natural finish," Bass recommends.

DO perk up your peepers: Spend hours staring at your computer screen, Blackberry or iPhone, and your eyes will red, irritated and screaming for relief. "Bloodshot eyes are never a good look, especially at an event where you should look polished and put-together," Bass says. "To look bright-eyed and well-rested, try some ROHTO eye drops. These drops not only lubricate and soothe your eyes, they have refreshing 'kick,' that makes eyes feel awake and refreshed instantly."