Hot Mama! Jessica Simpson Shows Off Her Toned Booty in Tiny Workout Shorts

The mother-of-two put her super-toned booty on display in a new Instagram pic, where she was seen working up a sweat in tiny shorts and a plunging black top.

"Lunge your bunz into @macys and get The Warm Up by @jessicasimpsonstyle #macysexclusive," she captioned the sexy pic, plugging her active wear line.

The business mogul also recently revealed how she maintains those gorgeous gams. "I work out five days a week: three days with a trainer, doing a mix of strength training and cardio, and then I do cardio on my own the other two days," she told InStyle.

It seems a healthy sex life with hunky hubby Eric Johnson doesn't hurt either!

"My husband and I were looking at old pictures recently, and I asked him, 'Babe, why didn't you tell me to put the brownie down?' He said, 'You looked great,'" she added. "He's always loved every curve on my body. And we've always had a healthy sex life."

When she's not hitting the gym, the blonde bombshell loves spending time with her family. "Marriage is unbelievable. I couldn't be more in love, and he's given me two of the best blessings -- Maxwell and Ace -- I could possibly imagine," she recently said on "Today." "Having a boy and a girl, I'm—I'm blessed," she gushed. "They inspire me."

We can't get enough of this adorable family, can you?