Katy Perry's break-up from Russell Brand inspired her new single, Roar.
The 28-year-old singer divorced comedian Russell Brand last summer and is now in a happy relationship with musician John Mayer.
But she has confessed that although she kept up appearances in public, privately she underwent some serious personal reflection after the break-up.
"For a while, even though I was coming off as totally with it, professionally and everything, maybe I was a little immature personally," Perry has told Access Hollywood.
"And so I finally just started garnering strength, and that's (when) I wrote (Roar). (It's) about becoming stronger and speaking up for myself and making myself roar, essentially."
The US singer released Roar from her forthcoming album Prism and claims she wants it to move her fans to be more self-confident.
Perry says Roar is basically about speaking up for yourself.
"And not letting yourself get in the way because everybody talks about bullying and things like that and while that is important, sometimes you are your own biggest bully. Sometimes, you are the person that gets in the way of everything - your success, your personal relationships," Perry explained.