Marvin Humes, Oritse Williams, JB Gill and Aston Merrygold unveiled the artwork for their last-ever single (sob!) on Thursday (26 September).
'Billion Lights' has been described as a "straight up pop banger" with a "serious electric edge which sees the boys bow out in true chart topping success and will uplift you and have you up on the dance floor."
JLS announced earlier this year they will separate at the end of 2013, but before leaving us, they'll release this new single, a Greatest Hits album and embark on a tour.
The album, Goodbye: The Greatest Hits, is released 18 November, while they'll kick off their tour in Belfast on 1 December. Tickets are on sale now.
Since rising to fame on X Factor, the foursome have enjoyed huge success, selling six million records and enjoying five number one singles and four best-selling albums.
They've sold out ten dates at the O2 – something only rivaled by Spice Girls, Take That and One Direction.
They told fans: "It has been the most incredible journey over the last 6 years and we have achieved more things than we could have ever dreamed possible. Thanks to all of you guys, your support, your dedication and your love, you have changed our lives forever and we wouldn't be where we are today without you."
As for the future, we already know Marvin, who is married to The Saturdays' Rochelle Humes, will co-present The Voice UK from January 2014 and has his DJ career and radio show on Capital FM.
Oritse, meanwhile, is currently showing off his dance moves on ITV's Stepping Out.
Reveal's favourite JLS moments in pictures:
Copyright: WENN ITV