Don Draper and Peggy Olson glam it up for the Sterling Cooper Christmas party. Photo: Frank Ockenfels 3/AMC, Mike Yarish/AMC

Ahh, our Sunday night "Mad Men" routine is back in place!

Sartorially speaking, last night's episode was a definite upgrade from the highly anticipated season 4 premiere last weekend, which featured a more somber palette.

This pleasant turn of events was due to the fact that it's Christmastime in "Mad Men" world, 1964-style.

Since most of episode 2 was centered around the Sterling Cooper holiday office party, the ladies of the ad agency -- Joan Harris, Peggy Olson, and a slew of secretaries -- plus the wives of Roger Sterling and Pete Campbell, were the show's main eye candy.

Perhaps not surprisingly, Joan, played by bombshell Christina Hendricks, donned the most drool-worthy outfits, wearing a series of her signature body-wrapping dresses.

We especially loved her royal blue boatneck dress with big buttons on the bust, as well as her jaw-dropping party outfit: a fire-engine red dress with two silk bows -- one on the neckline, one above the butt -- that she wore while swirling her hips and leading the conga line.


Are you swooning yet?

Peggy, on the other hand, kept things more professional in boxy Peter Pan-collared suits (one oxblood-red version gave us major Chanel Couture Fall 2010 flashbacks) and a boatneck (yep, again!) forest green party dress accented by a Christmas tree pin.

Betty Draper made two super-short appearances in the episode, but the last one, in which she wore a light beige coat with a fluffy fur collar paired with white gloves and bright red lips, was pretty much perfection.

Pete's wife Trudy and Roger's wife Jane also dazzled at the party with crystal embellishment lining the necks of their holiday frocks.

What will Christmas Day and New Year's bring to the closets of the "Mad Men" crew? We can hardly wait until next week to find out!

Keep clicking to read about how the women of "Mad Men" are required to maintain their natural curves through exercise restriction.