JLS have recorded a duet with The Saturdays' very own Rochelle Wiseman.

The group have close links to her outside of the music industry as she is the long-term girlfriend of band member Marvin Humes and he explained to Star magazine that when they wrote a part for a female she came into the studio and "laid down the vocals":

"She (Wiseman) does help out. We've got an idea for a duet with a female star but we can't say who yet. When we had written the girl part, Rochelle came in and helped out and laid down the vocals for it."

Despite the collaboration, JLS think the final cut will feature another singer as they already have someone else in mind:

"She did really well but we know who we want and it does look like it's going to happen with the other person."

Watch JLS' latest video for 'She Makes Me Wanna' here: