Katy Perry hides heartache

Katy Perry never wants to make her personal life the "audience's problem" when she is on stage.

The star's movie Katy Perry: Part of Me follows her California Dreams tour, but also captures the collapse of her marriage to Russell Brand.

In one scene, Katy is seen breaking down directly ahead of a show in Brazil. The star says her zest for performing will always prevail over her personal crisis.

"Yes, that was a very emotional part in Sao Paulo, where I had to basically throw myself on stage and kind of like separate my personal from my professional. Because I didn't want to make it the audience's problem - they had been waiting forever," she told the UK edition of OK! magazine.

"And whenever I think about the fact that maybe I could cancel a show, I go, well those people have been waiting and then all their babysitters have been waiting - there are so many people affected and I'm just one person, so get on the stage!"

Katy insists she's now moving on with her life following her divorce.

"I'm in a horrible place! I am 6ft under!" she joked. "I'm in a great place."