Credit: Mike Pont/FilmMagic

Bombshell perfection!

It's been a while since anyone's hair but Kate Middleton's made us have instant hair-envy, but all of that changed when Kate Upton attended a screening of her new film, The Other Woman, hosted by the Cinema Society & Bobbi Brown with InStyle on April 24.

The Sports Illustrated swimsuit model, 21, looked stunning in a simple-yet-chic bombshell hairstyle that complemented her Saint Laurent outfit. Loose, natural waves fell neatly around Upton's shoulders while the shine factor was out of this world. The deep side-part framed her gorgeous face (showcasing her sexy makeup of lined eyes and a plum lip), while the pinned-back section behind her right ear gave just the right amount of structure to the otherwise subtle look. 

Celeb hairstylist Peter Butler channeled "downtown Parisian chic" for Upton and has shared the surprisingly easy (and budget!) how-to with Us Weekly.

Begin with John Frieda Luxurious Volume Volume Building Mousse to clean, wet hair. Blow dry with a thick, round brush, concentrating at the roots for volume. Once dry, spray John Frieda Luxurious Volume Fine to Full Blowout Spray to the roots for even more lift and hold.

To create the loose curls, use a 2 1/2-inch curling iron for a "tiny kick on the ends but not a full flip," according to Butler. Make a neat side part and pin hair back on the side.

After the waves have cooled, spritz John Frieda Sheer Blonde Crystal Clear Shape & Shimmer Hairspray all over the style.