The X Factor winner kept her growing baby bump hidden underneath an embellished black T-shirt and heavy coat as she entered the London-based studio on Tuesday (18 March).
'Skyscraper' singer Sam announced her pregnancy at the start of March, surprising plenty of fans as there had been none of the usual is she or isn't she rumours beforehand.
It will be her third child with husband Craig.
Sam discovered she was expecting again after taking a pregnancy test in the bathroom of her local Asda while doing the weekly shop with her hubby.
Although the baby wasn't planned, Sam's clearly thrilled at the idea of becoming a mum again and has been proudly flaunting scan pictures for photographers after hospital visits.
Sam hasn't been able to slow down and just enjoy her big news, however, as she's in full promo mode for her debut album, The Power of Love, which is released on 24 March.
She's also been on the 'X Factor Live Tour' with the rest of last year's X Factor finalists. Her own solo tour has been pushed until next year following her pregnancy news.
While the baby's due date is still some way off, one thing has already been confirmed: who the godmother will be!
Sam's X Factor mentor Sharon Osbourne, who coached her to victory in December 2013, has agreed to take on the honour.
Lucky baby Bailey!
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Watch Sam's debut video for 'Skyscraper' below:
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