Joining her bandmates on the pink carpet at London's One Mayfair, the Irish singer's blossoming baby bump was on full display in a glamorous, floor length blue gown.
All five Sats looked beautiful. Though, let's face it, they always do, right?!
The Saturdays were at the glitzy event to pick up the prize for 'Ultimate #FabulousFriends in association with Baileys', which recognised their long-standing friendship both in the band and outside of it.
Caroline Flack presented the award.
Una - who is expecting her second child - was helped up the stairs to the stage by her fellow singers to make sure she didn't trip on her flowing gown, before she stepped forward to accept the prize on the group's behalf.
The Saturdays – Una, Rochelle Humes, Vanessa White, Mollie King and Frankie Bridge – were put together via an audition process, but have become firm friends, being bridesmaids at each other's weddings and hanging out away from the cameras.
They joked on stage it was perhaps remarkable they were so close rather than ripping each other's hair out!
The Cosmopolitan Ultimate Women Awards were judged by Fearne Cotton, who hosted the night, presenter Jameela Jamil, Made In Chelsea's Millie Mackintosh, The Script's Danny O'Donoghue, Baroness Karren Brady, Dr Linda Papadopoulous and Cosmo's Editor-In-Chief, Louise Court.
The Awards in full:
Ultimate Editor's Choice - Davina McCall
Ultimate #FabulousFriends in association with Baileys - The Saturdays
Ultimate TV Personality - Mel B
Ultimate Sports Star - Jo Pavey
Ultimate Style Icon - Abbey Clancy
Ultimate UK Music Artist – Ella Henderson
Ultimate Icon – Dame Vivienne Westwood
Ultimate Writer – Lena Dunham
Ultimate Men of the Year – McBusted
Ultimate International Man of the Year – Samuel L Jackson
Ultimate Breakthrough Actress – Natalie Dormer
Ultimate International Music Star - Taylor Swift
Ultimate Funny Woman – Morgana Robinson
Ultimate Inspiration – Ellen Page
Real Life Winners:
Ultimate Trailblazer- Paris Lees
Ultimate Woman of Courage - Kirsty Howard
Ultimate Game Changer – Dr Neha Pathak
Ultimate Body Confidence Queen - Bethany Townsend
Ultimate Love Story - Tom & Ellen Nabarro
Ultimate Campaigner - Temi Mwale
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