The group, who released their third LP Jukebox last November, admitted that they are already halfway through their next opus and revealed a number of the producers involved.
Marvin Humes told Digital Spy: "We're halfway through it at the moment and we've already put a lot of material together. We're off to Los Angeles tomorrow to work with Babyface, Sean Garrett - who's one of America's biggest songwriters - and Bangladesh (Rihanna, Lil Wayne).
"We'll be there for two weeks to wrap it up and then we're back in the UK for our tour. Then we'll prepare to release our new single."
Asked if the album will be more stripped-back compared to their last record, Aston Merrygold insisted: "Definitely. There's already been a few moments like that on our previous albums, but we want to take some of it back to our roots from when we first began.
"We love the way that Ed [Sheeran] performs on stage - it's incredible. We think we could do something amazing together in the studio. We believe it's all in the pipeline."
The group recently unveiled their new single 'Proud', which is in aid of this year's Sport Relief.
> Read Digital Spy's interview with JLS
Listen to 'Proud' below: