The 33-year-old looked incredible in leggings, cycling shorts and T-shirts in the clip for In The Style.
Billie previously told her followers it was her first shoot back since having daughter Margot and they couldn’t get over how good she looked.
One person commented: “How lovely does billie look? She looks amazing especially after just having a baby.”
A second said: “How do you look so good so soon having Margot! Incredible!”
While a third remarked: “You look amazing mummy of 3.”
The former Towie star and husband Greg Shepherd welcomed their daughter Margot into the world on December 2 last year.
The couple are already parents to Nelly, eight, and Arthur, five.
Speaking recently about how life is working with three kids, Billie said: “Greg’s having to do a bit more with the other two now, and it’s hard to find time for a real conversation with him, because after the bedtime routine I’m exhausted.
“I’ve moved into the spare room with Margot, because I’ve been co-sleeping with her.
“As soon as Nellie and Arthur are in bed, I’m in bed with the baby. But Greg and I did have a day date in London with Margot recently.”
Their new addition arrived not long after they moved into their new £1.4m Essex mansion after buying it in 2020.