Whitney Port sunglasses the hills re hair dress shirt coffee bean

Guess who's goin' braless and backless?

The newly-single 26-year-old reality star-turned fashion designer showed off her ultra-toned back while getting her java fix at Coffee Bean in LA (she's a native!).

Besides being a beautiful fashionista, this brainiac graduated from the University of Southern California with a degree in gender studies.

Find out who this sexy back belongs to, after the jump ...