It was a quiet night in for the singer, who cuddled up with her husband for the evening. "Loving my Hubby New Year's Eve," she wrote next to it.
Una (31) looks as pleased as punch as she hugs Ben, while he grins at the camera.
The pair spent the holidays in Ireland, with Ben getting his first taste of an all-Irish Christmas with plenty of roast spuds, trips to Mass, Irish coffees and matching novelty jumpers.
The couple also appeared on a celebrity version of Who Wants To Be A Millionaire last night -- collecting £50,000 for charity.
Una has been treating her Twitter fans to festive snaps throughout her holidays.
On Christmas Day, she posted a photo of herself with daughter Aoife Belle wearing matching red jumpers. The jumpers were a gift from fellow Saturdays' star Rochelle Hume, who is now pregnant and looking looking forward to becoming a mum.
Rochelle didn't take all the credit, admitting husband Marvin picked out the fashionable knits.
Later on Una tweeted a pic of Ben and little Aoife in their Christmas dinner gear, comprising a red romper suit and Santa hat on Aoife.
A photo later in the day of Ben relaxing post-dinner in his comfy onesie surrounded by the family pets, pugs Jackson and Bono.
This got a lot of reaction on Twitter from people claiming the dogs were overweight.
Una finished off her Christmas Day with Irish coffee before heading to bed.
It looks like 2013 is gearing up to be a big one, with The Saturdays about to launch in the US, with their own reality show, Chasing The Saturdays, airing on E!