The mum-to-be was spotted at the Prince's Trust Celebrate Success Awards in London this afternoon (12 March) and gave fans a glimpse of her new bump in a flattering floor-length dress.
While posing for photos on arrival, Sam placed a protective hand on her tummy, revealing just how much it has already grown!
She completed her red carpet look with silver jewellery, curly hair and a slick of red lipstick.
That's one yummy mummy!
This pregnancy has come as a surprise to the X Factor champion, as she is currently on tour with her fellow ex-contestants and gearing up to release her debut album.
In fact, Sam admitted that she found out she was pregnant in the toilets at a supermarket, while doing the food shopping!
Her happy news was confirmed earlier this month and she has been overwhelmed with support from music industry insiders, as well as her X Factor pals.
But that hasn't stopped Sam from feeling a little bit bad about the timing.
She told Reveal recently: "I felt so guilty. All these people has been working so hard on my album, to promote me and my work, and then I go and get pregnant."
The 36-year-old and her husband Craig are already parents to children Tommy and Brooke.
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