Katy Perry has revealed that she has already achieved the life goals she set out when she was 18.

The singer is set to release her first ever film 'Part of Me' in early July and she told Australia's Kyle and Jackie O radio show that it is strange looking back on footage of herself as a late teenager.

She said that the clips see an 18-year-old Perry reflect on her life goals - goals which she has now achieved at 27. She said:

"You see so much footage of me as a young kid, as 18, telling the camera, 'This is what I want to do, this is where I want to go, this is what I want to achieve in life'. It's very surreal to be looking back at that and going...'Oh, well I've done it'."

Perry meanwhile also spoke of her divorce from former husband Russell Brand, saying that in the aftermath she needed to separate her personal life from her professional life. She said:

"I still have to find the balance, I had to separate my personal from my professional. As an entertainer, I knew what my job was and I shouldn't like take it out on my audience - they've always been there for me."