'Skyscraper' singer Sam, 36, arrived at RTE studios in Dublin, Ireland, with minimal make-up and her blossoming baby bump hidden under an embellished black top and black coat.
But before long, the talent show star had transformed into a rock chick in subtle make-up, leather coat and leather trousers.
About to appear on The Late Late Show, Sam looked super glamorous in a colourful aztec-style shirt.
The Wanted's Siva Kaneswaran and writer Dawn O'Porter were also guests on the popular chat show.
Former prison officer Sam is expecting her third child with husband Craig Pearson.
They announced the happy news last month, when Sam tweeted her first ultrasound scan alongside the caption: "Hey everyone...... Meet peanut!!! :-)."
Sam and Craig already have daughter Brooke, eight, and five-year-old son Tommy. But we bet their godparents aren't as famous as 'peanut's' who will have Sharon Osbourne as an extended family member!
Do you like Sam's pregnancy style? Tell us below!
Watch the official video for Sam Bailey's single 'Skyscraper':