The series ten X Factor winner stood out in a cobalt blue gown while attending the Dirty Rotten Scoundrels gala evening in London on Wednesday (2 April).
Sam beamed for the cameras she posed next to Craig and with a protective hand across her stomach.
The former prison guard is expecting her third child later this year. Sam announced her pregnancy in March after learning she was pregnant by taking a pregnancy test in the toilets of her local supermarket.
Last night, she took a break from promoting her debut album The Power of Love to enjoy a romantic (and funny) night out with Craig.
Tweeting after the performance, she said: "I've just witnessed THE best comical timing ever in a musical... Pure genius from start to finish. Dirty rotten scoundrels at the savoy theatre xx a MUST see xx it's absolute genius and hilariously funny."
It's been a very good year for Sam so far. Not only is she expecting a new addition to her family, but The Power of Love topped the Mother's Day album charts, becoming the fastest selling album of the year and the first X Factor winner's debut album to hit number one since Alexandra Burke in 2009.
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Sam's not alone! All the stars who've announced pregnancies in 2014 in pictures:
Copyright: WENN Lexie Appleby/Future Image/Bridow/Instagram
Watch Sam Bailey singing 'Skyscraper' on the X Factor finale below: