Following a series of teaser snippets, a full version of Katy Perry's new single 'Roar' has appeared online; listen to it here.
The track - to be released on 12th August - is taken from Perry's forthcoming new album.
The full-length, titled 'Prism', will land on 22nd October (US). She announced the news last week on the side of a gold lorry driving through LA.
'Prism' is Perry's third solo album under the moniker, after 2008's 'One Of The Boys' and 2010's 'Teenage Dream'. She also released a self-titled record in 2001 using her birth-name, Katy Hudson.
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