Gorgeous Una is expecting her second child with rugby player husband Ben but she hasn't let it slow down her stage antics, as we saw last night!
Una was pictured shaking her bum alongside bandmate Frankie Bridge and giving it her all on stage at the Cardiff Motorpoint Arena on Thursday night (18 September).
Looking good, Una!
The Saturdays – which also include Rochelle Humes, Vanessa White and Mollie King – kicked off their nationwide tour earlier this month, supporting their Greatest Hits album reflecting on their career so far.
And it's been a busy time for the girls!
Not only is Una pregnant with baby number two – and juggling the tour with looking after two-year-old daughter Aoife Belle - but Frankie is combining the tour with rehearsals for Strictly Come Dancing.
She's among the celebrities competing in the new series of the BBC One show, which will air its first live performances later this month. Oh, and she's also got a one-year-old son to take care of.
Rochelle, meanwhile, has daughter Alaia-Mai, one, and has been working with Very.co.uk on a clothing line.
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