Katy Perry has just announced on her Twitter that she’s set to perform on the final night of the iTunes Festival in London, England on September 30th, and the full performance will be available to stream through iTunes!

Katy is the last performer officially announced for the iTunes Festival, which already includes the likes of Lady Gaga, Justin Timberlake, Robin Thicke, Avicii, Ellie Goulding, and more!

Every day in September, the biggest names in music perform live in London, England with the concerts streamed live on iTunes to every corner of the world!

Join the conversation on Twitter with the hashtag #iTunesFestival, and keep it locked here, as your official iTunes Festival station for updates, highlights and the chance to win a trip for 2 to the iTunes Festival!

Go to for more information.