Jessica Simpson is making Instagram sweat, and quite literally. The 40-year-old actress, singer, and clothing designer has been going full-throttle promoting the latter as Jessica Simpson Style continues to expand its empire - turning $1 billion in 2015 sales, the "Dukes of Hazzard" star's brand is still going strong, now branching into self-care, cosmetics, and its "Fiend" fragrance. The weekend brought Jessica's label offering up fresh promo, and with an arched back yoga pose, it was something Simpson herself knows all too well. Check it out below.