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4 January 2013, 16:37 | Updated: 4 January 2013, 16:56
The 'Tik Tok' singer says she has a special list for people who have been "soulless" to her in the past.
Ke$ha says she uses negativity to motive her in her music career and claims she keeps a "s**t list" of all the people who have wronged her in the past.
The 'Die Young' singer says negative comments from people only make her want to try even harder to prove them wrong, and says her early experiences in the music industry helped push her even more.
"I used [negativity] to motive me then, and I still do," Ke$ha reveals in the new issue of Seventeen magazine. "I remember every person who told me I couldn't do something or that I was ugly or too fat.
"I have a 's**t list', people from my past who have been soulless and judgmental," Ke$ha explained. "Even after I got through my awkward phase, got my braces off and figured out how to dress my body, people in the music business were like, 'You're never going to make it'.
"I see them now and I'm like, 'Ha!'," the pop star added. "That's one of the reasons I named my record 'Warrior'.
"You can be a victim and let that eat your soul or you can say, 'You're going on my list and I'm going to prove you wrong'."
Check out a picture of Ke$ha performing live on stage below (Credit: PA Photos):
At the end of 2012 Ke$ha also released her first memoir, a book called My Crazy Beautiful Life, giving fans access to never before seen pictures of her life and tour.
Ke$ha is expected to release 'C'mon' as the second single from her album 'Warrior'.