06/27/2012 at 11:00 AM EDT
When putting together her new concert documentary Part of Me
, Katy Perry
revisited several memories from the past year – and not all of them were pleasant.
In the film, Perry opens up
about her split from Russell Brand
at the end of last year.
"It's not always very fun [watching the footage]," Perry, 27, told reporters at the Los Angeles premiere
of the movie. "It's not like going out with your friends and having a drink and having a great time, but it's important to show that real people sometimes have to go through things in order to achieve things. Nothing great comes easily."
After a whirlwind few months in both her personal and professional life, Perry said she's ready for a break.
"I think I'm going to go into a cave after this, which might be appropriate," she joked to PEOPLE at the premiere. "It might be a little bit cooler than this. I would love to ... be in a beautiful, unplugged place where there's not a lot going on so that I can get back in tune ... and hopefully write some good songs."
A vacation would be well deserved. Perry said she was hands-on throughout the making of Part of Me
, even after filming was finished.
"I didn't give up any creative control," she said. "I was in the edit bay every single time."
Adds the singer: "I do everything myself. I'm a control freak."