The former X Factor star was pictured in London on Wednesday (14 May) looking very sleek and stylish in a billowing navy and cream cape that cleverly concealed any hint of bump from photographers.
Rebecca announced her third pregnancy in April, saying she is "grateful" to be expanding her family. She's already mum to kids Lillie May and Karl.
On 13 May, the besotted mum tweeted a picture of her latest ultrasound scan, showing her little baby.
She added the caption: "I am yours and you are mine. Already in love with my baby. Nothing else matters."
Rebecca's busy schedule hasn't slowed down in the wake of her pregnancy, as she was out and about yesterday holding meetings with her record label about album number three. She's also just finished writing a series of children's books which she's hoping to get published soon.
She tweeted on 4 May: "Finished my children's books today ... I love having new ambitions and ventures excited too see them published."
Rebecca finished runner-up on X Factor seventh series, which was won by Matt Cardle. Since then she's gone on to enjoy a successful solo career with debut album Heaven - featuring the fab single 'Nothing's Real But Love' – and second album Freedom.
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Celebrities who announced pregnancies in 2014 in pictures:
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