The singer was joined by her rugby player husband, Ben Foden, and her two-year-old daughter, Aoife Belle, for the showing of Frozen Sing-Along.
After Una broke her baby toe on celebrity diving show Splash! just a few weeks ago, it seems sky-high stilettos are out of the question for the yummy mummy.
That, or she just voted for comfort over killer heels... in which case, we don't blame her!
But there were no battered trainers or slouchy boots for Una. She opted for a pair of pointed pumps with metallic detail.
While Una's look a lot like Valentino's Rockstud patent leather ballet flats, £415, we'll be getting our studded flats fix with this New Look pair, £17.99.
She kept the rest of her look chic and minimal too with a white cami and faux leather below-the-knee skirt.
What do you think of Una's latest look? Tell us below as the best comment from across the site each week wins £50!