The boyband - Marvin Humes, JB Gill, Oritsé Williams and Aston Merrygold - who will split at the end of the year, debuted their final collaboration on radio stations today.
The song, which is the lead single from their album, Goodbye: The Greatest Hits, received its first airplay on Capital FM, with Marvin hailing the track as a "final gift" to fans.
"Hearing it on the radio is just amazing," Marvin explained on Capital FM. "We've had this track for quite a while now and it's just been our little baby."
Taking to Twitter, JB added: "Mad listening to 1st play of our last song on the radio for the last time! Brings back mind blowing memories! #BillionLights."
The song is already proving to be a hit amongst fans. One tweeted: "WOW! Got goosebumps listening to it, love it," while another fan added: "Going to be emosh but an amazing way to end an incredible journey."
Fans were building up to the momentum of the single's debut from last night and collectively got '#6YearsOfJLSandNeverForgetting' trending on Twitter.
'Billion Lights' is due for release on 10 November.
Listen to 'Billion Lights' below:
Check out our favourite JLS moments in pictures:
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