See the star's elegant look for week four's waltzes

By Alex Apatoff
Updated April 07, 2015 02:30 PM

In this week’s installment of her exclusive behind-the-scenes photo diary for PEOPLE,
judge Julianne Hough gives us major gown envy in her deep blue Marchesa stunner — perfect for a night that’s all about the waltz (whether or not Len Goodman agrees). Read on for all the scoop from Hough, plus her glam squad, stylist Anita Patrickson, hairstylist Riawna Capri and makeup artist Spencer Barnes.

Credit: Courtesy Julianne Hough

Courtesy Julianne Hough

“It’s not every day a gal can wear a midnight blue ball gown on a Monday night!” Hough tells PEOPLE (in the understatement of the century). “This midnight blue Marchesa gown is just so gorgeous and fun to wear.” Patrickson admits that the dress was so amazing, it was almost shelved for an episode closer to the finale, but “We decided to just go for it! Ultimately, life is short and if you find a dress you love and that looks fabulous, I say just wear it!” she says. (We’re printing and framing that motto for above our desks.)

“We accessorized it with gorgeous deco diamond and sapphire jewelry by Neil Lane,” Patrickson says. “The biggest challenge was keeping it from going too pretty. So a sleek knotted bun and a smudged eye kept it edgy and cool.”

Courtesy Julianne Hough

Barnes says the “smart, elegant, regal” dress not only dictated the dramatic eyeshadow, but Hough’s manicure as well. “I chose a cool palette to complement her deep metallic midnight blue toned nail polish — it was red but we had to change it as soon as the gown was decided,” he says. “We used a smokey metallic taupe with a focus on the bottom eyeliner being smudged lower than usual to create a more fashion vibe. I paired a stained lip with a berry undertone topped with a babydoll-pink gloss veil. I used very little bronzy brown tones and opted for cool shimmering pinks on her cheeks.”

And the “handsome” bun (Barnes’s words again) came courtesy of Capri, who says the dress “was so pretty we wanted to edge it up yet still be classy. So we chose a knotted sleek bun.” Of course, nothing is ever as simple as it looks. “Her hair is short so we needed clip-on extensions for the bun. Connecting the real hair with the fake hair to blend effortlessly is always a slight challenge!” (See the results from Capri’s instagram at home.)

Dying to get that look yourself? Take Capri’s advice: “Tie your hair in a sleek pony. Then split your hair in two sections. Take one section and tie it in a knot like you would your shoes. Do that over and over, then rubberband it. Do the same to the other side. Then take the two sections and form them into the shape of a bun and bobby pin into place! Simple and easy yet textured!”

Loving this look? Share below!

–Alex Apatoff

Related video: Behind the Scenes of DWTS