Chris Brown is the latest celebrity collaborator rumoured to be working with JLS as they try and break America.
The 21-year-old artist's popularity has taken a nose dive recently after he was sentenced to community service for beating his ex-girlfriend Rihanna last year.
However Chris's work is highly regarded amongst R&B fans and one newspaper is claiming that Aston, Ortise, JB and Marvin have already been in the studio with him.
Meanwhile Marvin recently tweeted that he and the boys were in the studio with the guys behind Cheryl Cole's Fight For This Love and the writers of Rihanna's hit Disturbia.
They are also rumoured to be collaborating with Jay-Z, Kanye West and Calvin Harris as they work on their second album.
The next single from JLS is The Club Is Alive, their own own version of Sound of Music's The Hills Are Alive.