Katy Perry has hinted that Russell Brand was threatened by her career.

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.

"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 realize, that's not true," she explained in her documentary, Katy Perry: Part of Me.

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: "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."