Leona Lewis' new album was born out of ''a place of frustration''.

The 'Fire Under My Feet' singer will release her fifth studio album in September and revealed fans can expect to hear her being ''very real'' on the collection, which she has openly said was inspired by her previous recording contract with Simon Cowell's label, Syco.

She said: ''I think the song with the most revealing lyrics on the album is 'Thunder'. The story behind 'Thunder' definitely has references to my experience with Syco and Simon, and the whole situation I was involved in before. Every lyric is so honest. It's literally very raw, very real. Some of the lyrics did come from a place of frustration because I didn't really know what I was doing for such a long time.''

The 30-year-old musician continued to say she is thrilled with the as-yet untitled LP because it has allowed her to express who she is.

She told Digital Spy: ''The album is all about empowerment, self-empowerment, building yourself up and not letting people say what you can and can't do.

''With this album I feel like I have total, total ownership.

''I fought very hard for my previous songs on my other albums, and fought very hard for that music, and I'm so proud of it. And this time it's been literally me on my own. I feel like people really get a very real version of me.''