ColourPop — 25% off sitewide, ends 1/26.
Nordstrom — New markdowns -- up to 40% off (shop here), including more beauty markdowns (20-40% off a lot of holiday sets) (shop here), ends 1/31.
Saks — Earn a gift card up to $700 with your $250+ purchase (including beauty) with code JAN20SF, ends 1/24.
Sephora — For those who redeemed points for % off: 15% off w/code 15REWARD, 10% off w/code 10REWARD, 5% off w/code 5REWARD (one-time use), ends 1/26.
Ulta — 20% off (including prestige) coupons out (check email!) (don't forget to activate special offers, check your rewards here), ends 2/02.