The 'Teenage Dream' hitmaker's forthcoming 3D movie 'Part of Me' features footage shot around the time she split from the British actor after 14 months of marriage last December and she wanted to include the clips to show people
they can bounce back from their difficulties.
She said: ''I think if you were to see the movie and it was completely avoided, you'd think, 'Hmm that's strange, I know something else happened in her life last year.'
''So I wanted to handle it delicately with the most integrity I could and show, 'Yeah I'm going through the same situation that half of America goes through and somehow I landed on my feet, so you don't have to lay down and die like you think.'
''Just because you're in the spotlight doesn't mean you get to dodge the curveballs - they're actually bigger.''
Despite her insistence on including the intimate scenes, Katy admits it didn't make for comfortable viewing.
She told TV talk show host Jay Leno: ''It wasn't always exciting to watch those unflattering scenes where I'm crying and having an intense moment but I think people will relate to me more seeing me at my lowest point and now at my highest point.''