The pregnant singer, 32, is expecting her first child with long-term partner Justin Scott and couldn't hide her excitement as she posted the snap.
Kimberley was about to make her appearance on the panel of ITV's Loose Women when she decided to take a selfie and another close up photo of her changing body.
"Ready to be a Loose Woman @loosewomen here we go," she wrote, followed by, "The bump is ready too #loosewomen."
Kimberley looked stunning in a figure-hugging black dress by Erdem with pretty floral prints. The former Girls Aloud star completed her look with nude court heels and had her fair locks styled into waves.
Girls Aloud send congratulations to pregnant Kimberley
Kimberley was still wearing her cast, after having suffered a fall and broken her wrist a few weeks ago. The pregnant songstress assured her Twitter followers that she and her "little munchkin" were doing fine after a check up at the doctors.
"I successfully took the entire weight of my fall on my wrist so baby is very happy," she explained. "The baby was literally waving at me to tell me everything's fine."
After Loose Women, television presenter Ruth Langsford commented on Kimberley's injury, tweeting, "You were great. See you again soon I hope...no more falling over please! x."
Kimberley confirmed that she would be making her one-off appearance as a guest panellist on Wednesday, sharing her excitement on Twitter.
As a keen user of social media, Kimberley also announced her baby news on the site, posting in February, "Justin and I are so happy to let you all know we are having a baby!!! Couldn't wait to share our lovely news with you all ❤."
Kimberley, who has been with Justin for more than ten years and shares a home with him in North London, recently opened up about her family plans.
"I would like a big family but I am realistic and I'm aware at 32 I have left it a little late," she said.
"So I'm realistic about how many I can have, but I would like to have more than one."