25 Star-Tested Beauty Tips & Tricks

We got the inside scoop on Taylor Swift's stunning cat-eye, Jessica Simpson's gorgeous updo and more celeb hair and makeup looks. Check out their top get-gorgeous secrets!

  • STAY IN SHAPE photo | Natalie Portman

Credit: Jeff Kravitz/Filmmagic

Updated: Tuesday Dec 13, 2011 | 06:00 AM EST By: Alex Apatoff & Zoë Ruderman

STAY IN SHAPE

Skin-care guru Margot Grant Witz, who has advised stars including Natalie Portman, says to keep up your regimen even if holiday parties have you ready to hit the pillow the minute you get home. When it's cold out and flesh feels tight, "Your face is stripped of its natural oils, kicking your skin into overdrive," she says. "Fine lines may be more noticeable, and your skin may break out due to having to produce more oil." Bottom line: Wash, cleanse and tone regularly!