The trick to Diaz's full lip look in "The Holiday" is using pale hues, says Prior. "If you have full lips and want to celebrate them, go with a light color &hellip if you have thin lips and want them to look larger, use a light color and add a gloss on top," Prior says.

To really add dimension, Prior recommends using a lip liner, "making sure it's properly blended," so you don't end up with crazy big Kylie Jenner lips. Try IT Cosmetics Your Lips But Better Waterproof Lip Liner Stain in Buff Nude, $20, for a soft, natural look.

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.