StyleWatchStar-Tested Beauty Tips & Tricks

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!