Katy Perry has announced via the medium of Twitter that she'll also be performing some songs at the iTunes Festival in London next month.
"PUMPED to announce I will be closing the month-long @iTunesFestival on 9/30 with my friends @IGGYAZALEA & @iconapop opening!" she shouted.
Quite a good lineup.
Tickets are free of course, so you just need to click here to enter.
In other Perry news, it's been announced that she'll close the MTV VMA awards with 'Roar' plus a new song, so that's quite exciting.
