Avicii has revealed that his iTunes Festival show will feature a special surprise.

The Swedish DJ is due to perform at the London Roundhouse tonight (September 13) as part of the month-long iTunes takeover.

Speaking to Capital FM, the 'True' star said that there is set to be a "unique" surprise in store at the event. He said:

"It's a great possibility to showcase all my new songs from the album and obviously other songs that I want to promote too. Obviously my album, a lot of songs from the album, and something unique for London too. I haven't had a show in five days or something so I've gotten some new stuff too."

Nile Rodgers' Chic are performing at the iTunes Festival on Saturday (September 14) and it has been speculated that he, Avicii and Adam Lambert could perform their new collaboration 'Lay Me Down' at some point over the next couple of days.