Kylie Jenner models Tyga's crisp boxer briefs

"Keeping Up With The Kardashian" star, Kylie Jenner, 17, has shared two selfies of herself wearing her "boyfriend" Tyga's Crisp-brand boxer briefs.

The model wore a push-up bra and Spanx-style, butt-boosting shapewear beneath her 'undergarments.'

Tyga, real name Michael Nguyen-Stevenson, designed Kylie's $12 white boxers from his core collection.

The 25-year-old,Grammy nominee  is reportedly producing Jenner's 'secret' debut album, and she's allegedly taking vocal lesssons.