The `Teenage Dream` hitmaker - split from her `Rock Of Ages` star husband in December after just 14 months of marriage - and although Katy thought he was `the one`, she admitted that work commitments got in the way. Speaking in her new documentary film `Katy Perry: Part of Me`, she explained: "I thought to myself, `When I find that person that`s going to be my life partner, I won`t ever have to choose [between the partner and my career]. They won`t be threatened or have weird motives.` Then I started to realise, that`s not true." Katy has now moved on and is dating Florence + the Machine guitarist Rob Ackroyd but says she did everything in her power to save her marriage, before finally acknowledging it was over. She said: "I have that same belief system with everything, from career to my life to my personal life, everything. And I will do everything it takes to not fail. And I did everything it took, but it still failed." Katy`s forthcoming 3D movie features footage shot around the time she split from Russell, including scenes where she is crying on a bed, and she has previously revealed 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."