Hair How-To: For Union's shiny, bouncy curls deep condition your hair the night before so it's extra glossy. Blow-dry your with a round brush then use a large curling iron, rolling hair around the barrel in one direction and then again in the other direction. Once you're done, mist everything with a lightweight shine spray.
Makeup Tip: Give your regular smoky eye a sultry holiday upgrade by using metallic shadows. Use a dark blue or purple for shading and lining and highlight your brow bones and inner corners with a champagne color. Check out the Bobbi Brown Metallic Eye Shadow collection ($20 each) for a slew of stunning options.
Hair How-To: Party hair doesn't have to be complicated or stiff to look sophisticated. Case in point: Kate Bosworth's pretty low side ponytail. Create a deep side part then wrap your hair around a 1-inch curling iron. Loosely everything under one ear and secure with a clear elastic. Leave some pieces loose around your face.
Makeup Tip: When sporting a bold red lip, take a cue from Bosworth and keep the rest of your makeup to a minimum — gorgeous skin and a touch of mascara are all you need.
Hair How-To: Yet another example how a regular ponytail can look a whole lot sexier with a few tweaks. For Swank's glam version, tease your roots, but keep the sides sleek when you pull your hair back into a tight, mid-level pony. Mist the length of the tail with a shine spray to keep your hair smooth. We like Oscar Blandi Olio Di Jasmine Shine Spray, $22.
Makeup Tip: When it comes to matching your eye shadow to your dress, it's easy to go overboard. The trick is to keep it to subtle, with either a hint of bright liner or a pop of color on the lids.
Hair How-To: Take a cue from the Gossip Girl star and weave your hair into a low, loose side braid. Let your shorter pieces fall around your face and don't worry if some strands stick out of the plait.
Makeup Tip: The easiest way to make your eyes look big and bright is to blend a bit of pearly white shadow or highlighter in the inner corners, like Lively did here. Try BeneFit Creaseless Cream Shadow in Ice Shot, $19.