For skin as satiny smooth as McAdams's, Prior says a primer like Lancôme Visionnaire 1 Minute Blur, $55, will help even out skin tone and hide pores. Once you've applied foundation, dust a translucent powder like Make Up For Ever HD Microfinish Powder, $34, over the face to set your makeup and reduce shine.

The holidays are all about sparkle and light, so why shouldn't your hair follow suit? Getting Witherspoon's killer shine starts in the shower, says Jeffrey Jagged, a stylist at the Cristophe Salon. "For this look, don't skimp on a fantastic shampoo and conditioner. Make it your early Christmas gift to yourself," Jagged says. Try R+Co Moon Shine Shampoo, $24, and conditioner, $25.

Prep wet hair with "just a dab" of straightening fluid, then blow the hair dry in a downward direction, using a large round brush. To get hair super sleek without "that dated stick-straight look," Jagged recommends straightening large sections of hair with a ceramic flat iron, "rock[ing] the iron inward at the ends."

Prior says the trick to creating a successful smoky eye like the one Penelope Cruz wore in "Noel" lies in "keeping all of the definition around the eyelid and lash line."

For instant drama, start with a heavy coat of mascara (like Napoleon Perdis Mesmer-Eyes Mascara, $39), then rim the waterline with a dark pencil. To amp up the effect even more, apply charcoal shadow along the lash line around the entire eye, from corner to corner.

Until we can swap homes with Winslet for a London holiday like Cameron Diaz did onscreen, we'll settle for swapping hair with her. Here's how to master Winslet's undone waves for your office party or dinner with your extended family.

To get the look, Jagged says to start with a volumizing spray like Living Proof Full Root Lifting Spray, $26, and blow dry hair with a round brush. Once your hair is dry, use a 1-inch barrel iron and curl 1-inch sections of the hair. After the hair has cooled, run your fingers through the curls to soften them, then finish with a flexible hold hairspray.

According to Prior, faux lashes have just as much place at the office holiday party as they do at the New Year's Eve soiree. "Sharon Leal's look is a great example of how a false lashes can present a nice, made-up look," she says.

To keep falsies looking natural, curl your own lashes with the falsies and apply mascara on both the top and bottom for better blending -- and use a softer lash, like Shu Uemura Soft Cross False Eyelashes, $23. Prior also advises you "check the length of the [false] lash against your own lash line to see if it looks to dramatic or long." If it doesn't match up, Prior says trim the false lashes.