Images: imaxtree.com

Seen At: Ralph Lauren, Michael Kors, Christian Dior

Who's Wearing the Trend: Jennifer Aniston, Victoria Beckham, Portia de Rossi

Why We Love It: We can bet that the guys would agree when we say that there is nothing sexier on a woman than a men's white oxford shirt. We love the versatility of preppy menswear pieces; the trend is perfect for the office but also serves well as casual weekend wear. Plus, frugal shoppers rejoice! All you have to do is hit up your boyfriend's closet to get the look.

Pair It With: Pair this timeless trend with feminine or modern pieces if you want to keep the gender-bending in check. A classic way to incorporate preppy menswear into your look is to pair a button-down and oxfords with your favorite pair of jeans for the weekend. If you're feeling a little adventurous, try on a newsboy cap or a neck tie, like the ladies on the runway.

The Must-Have Piece: Ralph Lauren navy wool blazer with crest, $545.87, at mytheresa.com

Ultimate Steal: See By Chloe navy and yellow polka dot cardigan, $120, at theoutnet.com

Related: Tighten Up With Body Conscious Pieces