First, try a chevron rug. They're are all the rage, and fairly easy to find: Craigslist, Urban Outfitters and Overstock.
Next, add in elements of red or shades of pink - like the bench and headboard pictured above. When decorating a bedroom, consider using calming, pale colors rather than primaries. (It's OK to stray a bit from whatever fashion look you're trying to imitate!)
Third, add an element of texture like Rosie's jacket. This room uses a fur throw.
Finally, use framed art in neutral tan and gold tones to tie the color theme together. Add a splash of light blue - or any other coordinating color - just as you would add a colorful bangle, ring or earrings to Rosie's outfit before walking out the door.
images from instyle.com and ICDC files.