And It's Backstage Beauty For the Win on Instagram!

This week in celebrity beauty Instagrams, we saw stars get ready for red carpets, runways shows, and Sundance premieres. Though temperatures are freezing in most places, these A-listers managed to look hot (thanks to a little help from their friends). Some highlights: Alexa Chung's Spring-ready floral nail art, January Jones's backstage beauty shot, and Joan Smalls's stunning cat-eye liner. See more of our favorite filtered photos, and don't forget to keep up with our editors by following POPSUGAR Beauty on Instagram!

Source: Instagram

Ashley Benson

Ashley Benson

Sparkles and spikes made for a fierce manicure on Ashley Benson.

Nicole Richie

Nicole Richie

Andy Lecompte worked his hairdresser magic on the fashion designer's beach waves.

Alexa Chung

Alexa Chung

The It Brit showed off a darling daisy manicure. Someone has an early case of Spring fever.

Jaime King

Jaime King

The actress prepared to get pretty in pink.

Mindy Kaling

Mindy Kaling

Hollywood's funny lady proved you can match your nails to your accessories — even when glitter is involved.

Karlie Kloss

Karlie Kloss

It was selfie time for Karlie and makeup artist Pat McGrath backstage at the Atelier Versace Haute Couture Spring 2014 show.

Cara Delevingne and Lindsey Wixson

Cara Delevingne and Lindsey Wixson

Before the Chanel Haute Couture Spring 2014 catwalk, the models (and social media stars) gave a glimpse of that epic club-kid glitter eyeliner and ultramessy bed head.

Joan Smalls

Joan Smalls

As the megamodel prepared to walk the Haute Couture runways, she gave us a peep of her dreamy cat eye and flawless skin. Saturday-night inspiration, anyone?

Hilary Rhoda

Hilary Rhoda

On Wednesdays, we wear pink pouts . . . if you're friends with Hilary Rhoda.

Karolina Kurkova

Karolina Kurkova

A black-and-white palette is anything but boring when you colorblock it like Karolina did.

January Jones

January Jones

January took her first-ever Instagram snapshot from the beauty chair. Look at the va-va-volume!

Diane Kruger

Diane Kruger

Hairstylist Christian Marc made sure Diane was red-carpet-ready with a soft updo, which was just one of the amazing beauty looks at the Sundance Film Festival.

Beyoncé

Beyoncé

Before celebrating Michelle Obama's birthday, Beyoncé relied on makeup artist Sir John for a touch-up .

Lupita Nyong'o

Lupita Nyong'o

Bold-lip queen Lupita tried a burgundy hue on for size.

Emma Roberts

Emma Roberts

The on-set makeup was a little bloodier than usual for Emma.

Lea Michele

Lea Michele

Those bangs! Lea Michele teased Glee's 100th episode with a look at her sleekly styled locks.

Jessica Alba

Jessica Alba

Jessica smiled in a bright red lip as she soaked up the snowy weather.