Katy Perry's early Roar release
Katy Perry has brought forward the UK release date of her new single, Roar.
The California Gurls singer had planned to release the track on September 8 in the UK despite it already being available in most other countries but tweeted that she was bringing it forward by a week.
She tweeted: "ATTN UK! I'm letting #ROAR out a week early. Go here to pre-order now, & you get the song THIS SUNDAY, September 1! http://po.st/RoarUKiTunes."
The single comes from new album Prism, which is set to be released on October 22.
Katy recently told MTV she had changed her mind about the record being dark: "There's not really any darkness on the record. There's definitely some textures and colours but I think I was saying that when I was going through a different phase, but I really let that light in.
"The reason why I called this record Prism is because I actually finally let the light in and then I was able to create all these songs that were inspired by letting the light in and doing some self-reflection and just kind of working on myself.
"I felt very prismatic because of that; I feel like now I get to show these songs off and share these songs with the listeners and it's almost like I get to beam the colours that I've experienced out from me."
Katy is set to close the month-long iTunes Festival in London on September 30.