This will be the first headline gig for the 27-year-old in six months.

The singer has promised "One hour of all new music" at the Roundhouse show on September 1.

"#UKMonstersGetReady," she encouraged via her Twitter page.

The iTunes festival is evidently an opportunity for Gaga to premiere the material from her forthcoming album, Artpop, which is due for release on November 11.

Also playing at the festival are Arctic Monkeys, Avicii, Elton John and many more big names.

All shows are free, the only catch being that tickets must be won through an online competition.

Gaga's new track, Applause was released on Monday after snippets of it surfaced online.