As Coco Rocha adds the Sass & Bide Spring '13 campaign (and her social media takeover) to her ever-growing portfolio, a slew of top models are popping up for the season, too. See, February isn't so bad, is it? Now we get to see Joan Smalls smolder for Prabal Gurung, Kate Upton sex it up for Sam Edelman, Erin Heatherton pose for XOXO and Alexa Chung return to Maje. Let's take a look—and be sure to stop by Sass & Bide to see what Coco is up to.

Joan Smalls for Prabal Gurung

The Victoria's Secret Angel adds Michelle Obama-anointed designer to her modeling roster, which includes Gucci, Chanel, Roberto Cavalli and Rag & Bone. We have no words beyond gorgeous. Oh and flawless (that's two, huh?).

Still speechless. [Photo Credit: Prabal Gurung via Glamour]

Kate Upton for Sam Edelman

Super hot and sometimes controversial Kate Upton is an interesting choice as a spokesmodel for shoe designer Sam Edelman. Meaning: We're not usually looking at what she's wearing on her feet, eh hem. 

Shoes, what shoes? [Photo Credit: David Lipton/Sam Edelman via New York Daily News]

Erin Heatherton for XOXO

All-American tomboy-ish model joins fellow Victoria's Secret Angels Miranda Kerr, Tyra Banks and Alessandra Ambrosio as part of the label's "Hugs and Kisses" Spring '13 campaign. According to Stylebistro, the full campaign will debut online on Feb. 5 and in print in March. But here's a sneak peek and watch Erin talk about the shoot right here. Can you wait until Feb. 5?

Leonardo, who? [Photo Credit: Rocco Laspata/XOXO via Kaplow via Stylebistro]

Alexa Chung for Maje

This is the second season that the French label tapped the model/TV presenter/all-around fashion girl crush Alexa Chung as the face of the brand. According to The Fashion Spot, Alexa is also the inspiration of the "Andy Warhol Pop-Art"-referential collection.

[Photo Credit: Craig Dean/Maje via The Fashion Spot]