Work it, girl.

Kendra Wilkinson is dropping the last of her 50 pregnancy pounds with Us Weekly. She and her trainer Nicky Hollander are starring in a workout video called Taking It Off With Kendra, to be sold this spring. Get more details here.

PHOTOS: Look back on Kendra's bump days

How is her slimdown going? Wilkinson, 24, lets Us inside the Los Angeles home she shares with husband Hank Baskett to take a peek. "I want to get physical. I wanna hear your booty clap," the mom to 4-month-old Hank IV jokes before she launches into her sweat session.

PHOTOS: So in love! See Kendra and Hank's wedding album

Hollander leads her through a set of crunches and instructs to strongly contract her abs.

"Contractions? No more of those!" jokes Wilkinson, who spent more than 24 hours in labor before undergoing a C-section.

VIDEO: Kendra reveals her stretch marks

The 5-foot-4 reality star (her series, Kendra, airs on E! Sundays at 10 p.m./ET) was a slim size 2 and 113 pounds before getting pregnant. In March, she told Us Weekly she weighed 140 pounds.

"Having a different body [has been] such a culture shock. I'm so used to being hot and fit," she said.