The 30-second commercial shows the former X Factor stars performing their biggest hits and the Mariah Carey Christmas classic 'All I Want For Christmas Is You' at an outside gig for 150 fans.
The band can also be seen surprising a number of screaming fans with hugs and gifts, before posing with them in a giant photobooth.
A Very JLS Christmas is the fourpiece's first festive TV special. The show is due to air on Saturday, December 22 at 6pm on Sky1.
The band recently announced that they would play a second date at London's O2 Arena on December 22, 2013 as part of their upcoming UK tour. Tickets for the concert went on sale earlier today.
Listen to JLS's new single - the second from their fourth studio album Evolution - 'Give Me Life' below: