The Saturdays still have work to do says Una

The Saturdays have revealed they can't rest on their laurels in their bid for chart domination.

The Sats' Una told Digital Spy: "We had a number one this year and I felt like we were at the top that day."

"But with the music business you kind of have to keep trying all the time - you're never comfortable at the top."

"We were number one for that week but then the next week you're not and it's like, 'Oh'."

Back in March, What About Us was the group's first ever track to reach the top spot.

"[People ask] when are they going to get another," bandmate Mollie added . "Well we've got one and we've each got a plaque at home saying number one and I'm happy."

"And underneath us at number two was Justin Timberlake, so that made me double happy!" new mum Rochelle continued 

The girls released their fourth studio album, Living For The Weekend, in October where it reached number 10 in the charts.