The 'Wide Awake' singer launched her new film in the UK capital while Lawson and Conor Maynard also attended.
Katy Perry Admits She Would Never Write An Album Like Adele's '21'
The 'Firework' star says she is "in a good place" following her marriage breakdown.
Katy Perry has confessed that she could never write an album such as Adele's '21' because she couldn't devote a record to her heartbreak.
The 'I Kissed A Girl' singer told The Sun newspaper that she is looking forward to the future and insisted she is in "a good place".
"I'd never devote a whole record to heartbreak," she revealed. "I'm happy, I'm in a good place, I'm looking forward to my future.
The American star, who releases her new movie Part Of Me 3D in cinemas today (5th July), is seen enduring the strains of her marriage breakdown on tour during the film and told the publication that her hectic schedule ultimately lead the split with comedian Russell Brand.
"If I could edit it any other way I would, but that is exactly the way it was," she said. "I always had plans to make this record and usually with a record, you tour a record.
You can view a picture of Katy Perry at the London premiere of the movie this week below:
"Touring is always important to me. It's like a big IOU to my fans, because I know they are the reason I exist."
The star has vowed to go into hiding when she finished the promotional schedule of her film and has already promised her lyrics will most likely get "darker" on a new album.
Katy spoke to Capital at the premiere of the new flick and revealed that she is hoping good friend Rihanna and also Prince Harry will go down to see the movie.
Check out Capital's full gallery of Katy Perry's Part Of Me 3D London premiere below:
Latest Katy Perry
The 'I Kissed A Girl' singer's marriage came to an end at the close of 2011 and was finalised in summer 2012.
The 'I Kissed A Girl' singer was said to be seen getting close with the Hollywood action star.
As Rita Ora stars opposite Snoop Dogg and David Beckham in a new animation, Capital looks at other pop stars who have been transformed into cartoons, including Katy Perry, Lady Gaga and Rihanna.
The 'Part Of Me' star is back with the final chapter from 'Teenage Dream'.