The Lullaby hitmaker rolled up her No 77 sports jersey, by Aelfric Eden, to show her stomach.
Faith also donned a black-and-white polka dot skirt, by Taylor Dorry, as well as a matching striped baseball cap from 6Crayon.
And in the second image, the Celebrity Traitors contestant was lying on a bed while dressed in the same outfit.
Her surprise pregnancy announcement sparked congratulatory messages in the post’s comments section.
One user said: “Congratulations, Paloma!
“Take care of yourself and I hope everything goes well for you.”
A second fan wrote: “Congratulations you look beautiful.”
And a third follower penned: “Aww this has made my day!
“Congratulations to you all.”
It is believed Faith is expecting with her boyfriend Stevie Thomas, a director of Birmingham music venue The JamHouse.
The Only Love Can Hurt Like This singer went public with her and Stevie’s relationship in March.
It comes three years after she and her ex-husband, artist Leyman Lahcine, divorced.
Faith and Lahcine have two daughters, who were born in 2016 and 2021, respectively.
Their names have never been revealed.
In 2024, Faith claimed co-parenting does not exist and that she had to do the lion’s share of looking after the children since her and Lahcine’s split.
The star, who was married to the artist for five years and together for 10, told Women’s Health magazine: “I don’t think co-parenting exists; women still do the bulk of the parenting. There are anomalies, but we need change.
“Being a single mother is exhausting, but I do have two nights a week when my daughters are with their dad to do as I please.”
Faith also blames having children for the demise of their relationship.
She said: “I think for me, becoming a mother was such a massively life-changing experience that for the first time in my life, I needed more than nothing – and that just wasn’t there.
“Our relationship ended because we have those children. And I think that was worth it.”