Lady Gaga has hinted that she will be joined by a special guest for her comeback gig next month.

The ‘Bad Romance’ singer hasn’t played a gig since February and since she had to have surgery for a hip injury. The comeback gig is due to happen on September 1st, when she will be opening the iTunes Festival at London’s Roundhouse.

Speaking to Kiss FM, Gaga talked about the collaborations on her upcoming album ‘ARTPOP’, refusing to name any names, but added: "But at iTunes at the Roundhouse we will be revealing one of the collaborations that we're doing and I'm excited for everyone to see that."

The singer also confirmed that Azealia Banks is not a collaborator on her new album, despite Banks claiming last year that the two were working together.

Lady Gaga recently unveiled her latest single ‘Applause’, which she will perform live for the first time at the MTV Video Music Awards in New York tomorrow.

Check out the video for ‘Applause’ below: