The group went on hiatus in 2011 to allow Contostavlos, along with rappers Dappy and Fazer, to launch solo careers, but they are now said to be planning a comeback, reported Contactmusic.
The photograph was taken by Contostavlos' personal assistant and has sparked rumours the band is working on new music.
Contostavlos has endured a tough time during her hiatus from N-Dubz. Her solo career was branded a flop after her album limped into the UK charts at number 35, and she was dropped from her role as a judge on Britain's 'The X Factor'.
Her bandmate and cousin Dappy has also been in the headlines for all the wrong reasons. Earlier this year, he was convicted of assault stemming from a brawl at a gas station.
