Katy Perry has "a lot to say" on new album, reveals collaborator

Katy Perry's forthcoming album will be "deep", according to Bonnie McKee.

The singer-songwriter, who is collaborating with the star on her upcoming LP, said that Perry's new material is far from what her fans are used to.

She told MTV: "It's kind of a departure from what she's been doing in the past. We are a great team when we write together because we don't let each other settle; every single line is a philosophical debate."

The 27-year-old's ex-husband Russell Brand filed for divorce from the singer in December. The final stages of their relationship are expected to be reflected in Perry's music.

McKee continued: "She's going through some major life changes, so it's not all about bubble gum and fun; it's real and it's deep and she has a lot to say. So I think people are anxious to hear it.

"I'm working with Katy and it's great. I'm really excited and I think everyone is going to really relate to and love what she's doing next."

She concluded: "You know what? The numbers don't lie. Katy Perry is a star for the people... she's unstoppable and she's proven that."

> Katy Perry debuts new single 'Part of Me' in full - listen

Watch Katy Perry's Last Friday Night video below: