Fashion—it's an obsession for millions. But for four lucky, talented girls, fashion is a full-time, style-transforming . . . internship in New York City! Some might call it work, but as interns at high-end Couture magazine, Callie, Nadine, Ava, and Aynsley are workin' it in style.

Callie Ryan:

Innocent aspiring designer or claws-out fashion phony?

Nadine Van Buren:

Brings the party. Loves to party (even if it's a pity party).

Ava Barton:

Happy to be here . . . and about to take over!

Aynsley Rothwell:

Sexy socialite with a killer wardrobe—and the attitude to match.

Hanging with the Couture interns is what's in this season. But who's the glamorous sage behind the Fashionista blog serving up style wisdom and sartorial send-ups?

It's enough to spark a hot-and-heavy fashion frenzy. Hold on to your Manolos . . . read on and find out.