Katy Perry's "Prism" album, including the song "Roar," will be...

Katy Perry's "Prism" album, including the song "Roar," will be released in October. (July 30, 2012) Credit: AP

Katy Perry is roaring after her new single was leaked three days early.

"HEY! I know how you guys can make me feel better about the leak," the singer tweeted Sunday, "Get #HAPPYBIRTHDAYDAVID trending for my lil bro's 25th today!"

Although the hashtag hasn't caught on, news of Perry's leaked song "Roar" has received a lot of attention. According to Billboard, she was set to release the "Roar" single from her "Prism" album Monday, but it arrived early on Saturday. The album itself will be out Oct. 22. 

The chorus of the upbeat anthem, true to Perry's style, is "I got the eye of the tiger, the fire/Dancing through the fire, ’cause I am a champion/And you’re gonna hear me roar." 

The star has been through the good and the bad -- a successful music career and a public divorce from Russell Brand -- but she makes herself seem unstoppable with these lyrics. 

Have a listen to the new single here. 

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