So, Lady Gaga might be opening the festival, but it appears her recent pop "rival" Katy Perry will close the season of shows (September 30th).

Perry will join the likes of Sigur Rós, Vampire Weekend and Chic at the Roundhouse in Camden this September. Supporting Perry will be Icona Pop and Iggy Azalea.

The folks at iTunes really pulled it out of the bag this year, didn't they?

For more information, and to apply for free tickets, head here.