The Saturdays singer married rugby player Ben in Ireland in 2012 and is head over heels for her man, often sharing pictures of the couple together and with their one-year-old daughter Aoife Belle.
But this time Una, 32, decided to treat her fans to an image of her hubby posing topless, flaunting his six pack and flexing his biceps.
She added the caption: "I love the muscles! #showoff #iwould".
Ben, 28, is a rugby union star who plays for Northampton Saints and England, so it's no surprise that his body is looking in tip-top condition.
Meanwhile, Una is currently getting in the sporting spirit too by taking part in the ITV diving competition, Splash!
The songstress is putting her body through its paces and working hard at the pool, perfecting her dives with Olympic star Tom Daley.
Today (17 January) she revealed that she is tackling the 10 metre board, writing on Instagram that it was "a long way up!!!'
But at least she can come home afterwards for some cuddles with Aoife and hunky Ben!
What do you think of Ben's hot bod? Let us know below, as the best comment from across the website each week wins £50!
Got an iPad or iPhone? Reveal Mag has been especially designed to fit!