Jamelia – who already has two children – shared the baby news with her shocked 46.9k followers on Instagram.
The Loose Women star – who is 36 years of age – posted a picture of her bump alongside heart and baby emojis.
Jamelia – who sang hits such as Superstar and Thank you – also revealed she married a new man in secret, after announcing she'd split from boyfriend Jean Louis Pascal on Loose Women last year.
Here's everything you need to know about Jamelia's surprise pregnancy, from bump to birth...
Jamelia showcases baby bump
The Loose Women star showed off her baby bump as she attended her brothers wedding.
She looked amazing in a lilac bridesmaid dress as she caressed her baby bump at eight months pregnant.
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Jamelia's due date
Jamelia is reportedly six months pregnant [September 2017].
If this is the case she will be welcoming her third baby in December 2017.
Who is the father of Jamelia's baby?
Jamelia revealed she married a mystery man in secret on her Instagram account on 14 July 2017.
Sharing a picture of her hand and his with rings on their wedding fingers, she wrote: "I hear it's #BlackLoveDay "When we say 'Black Love' it isn't just about some Black people being in love, It is a Revolutionary Act"
"I've spent the last few months counting my blessings as my patience, belief & audacity has led me to the Man who understands & also agrees with the above entirely..."
Speaking about her "husband" at an event in Birmingham recently, she said: "I’m older this time, so it’s been a very different pregnancy to my last one. It’s been very up and down and it’s really affected me.
"At one stage, my husband told me to get off Twitter because I get so passionate and so involved."
Jamelia revealed she had split from boyfriend Jean Louis Pascal on Loose Women in 2016.
She was previously married to footballer Darren Byfield with whom she shares a daughter, Tiani Byfield, 12.
Jamelia also has a 16-year-old daughter with her former music manager, Terry Wallen, called Teja Wallen.
Jamelia's pregnancy symptoms
Jamelia shared two pictures of her baby bump and revealed it's having a positive impact on her hair.
She wrote: "This lil' bubba has been causing us sooooo much trouble. But what's it's been doing to my hair has made it all worth it... Mine curls doth poppeth (Please don't kill my vibe by telling me it's all gonna drop out when I give birth I have faith in the follicles).
She also admitted on Twitter she'd been having weird pregnancy dreams.
Jamelia told her followers: "Pregnant dreams are so crazy last night Justin Beiber & I argued over our baby's nursery fees...night before I went to a fair with Beyoncé."
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