Jeff Bezos' fiancee Lauren Sanchez flaunts her VERY toned abs in a crop top as she hits the gym with billionaire founder

The mom-of-two, 53, shared a clip to her Instagram Stories as she worked up a sweat in the gym with a handful of others - including her husband-to-be.

Jennifer Aniston, 54, Flaunts Fit Figure In Sports Bra

Ivanka Trump flaunts abs, legs in sequined separates at Kim

Jeff Bezos, Lauren Sanchez Sail French Riviera, Massive Diamond on Display

Jeff Bezos stole girlfriend Lauren Sanchez's trainer

Lauren Sánchez wears Alo Yoga set on trip with fiancé Jeff Bezos

fitness : Top and Latest News, Articles, Videos and Photo About #fitness

Jeff Bezos: Lauren Sanchez shares raw footage of her gruelling gym routine

Teen Mom' Star Kailyn Lowry Shocks Fans With Post-Baby Body

Jeff Bezos, Lauren Sanchez Sail French Riviera, Massive Diamond on Display