LOS ANGELES -- Things aren't all dreamy in Katy Perry's new 3D concert film, opening Thursday.

The pop star's energetic Day-Glo performances and chart success -- tying Michael Jackson's "Bad" with five No. 1 singles from her album "Teenage Dream" -- are undercut by heartbreak. She sobs uncontrollably backstage as her marriage to Russell Brand falls apart during her world tour, and talks about her dashed desire for "fairy tale" romance.

In an interview, Perry spoke about sharing her side of the breakup on-screen and plans for her next album.

>Your relationship with Russell Brand supplies the narrative arc of the film. It's very personal. You're crying on screen. Is it the same to you as doing a break-up song like "Wide Awake"?

Oh my God, I have tear ducts! Crazy! I am human! I think it was important for me to leave some of the more difficult things in the film so that it wasn't just a narcissistic fanfare film about how great I am. Because I'm not all great.

>Where are you at on the next album? Will there be a shift in your sound?

I don't want to completely self-sabotage everything that I've got and alienate everyone. But I definitely want to take some chances as I always have.

>What will change in your next phase in terms of balancing your public and private life?

I'll continue to try and balance like a circus act. And I will just fight to always tell the truth -- even if it's difficult.