Demi Lovato thinks fame is ''weird''.

The 25-year-old singer was thrust into the limelight after starring in Disney's 'Camp Rock' in 2008 and released her debut single 'This Is Me', and though Demi still can't really get her head around her celebrity status, she thinks she has learnt to ''manipulate'' her stardom to talk about issues and causes that are important to her.

Speaking in Notion magazine, she said: ''Fame is weird, but I manipulate it for the better. We already are in a very narcissistic career - 'look at me, look at me'. I use that as a way to use my voice for more than just singing. If you are not using your voice and not standing up for the things you believe in, and not being vocal about certain topics, then you're just basking in the glory of a very egotistical career.''

And the 'Cool For The Summer' hitmaker believes there are a lot of artists who do not speak out about their beliefs and other important matters because they want to be ''politically correct'' or do not want to say anything that could be considered to be controversial which then could harm their career, something which Demi finds ''frustrating''.

Demi has spoken very honestly and candidly about her battle with alcohol and drug addiction, eating disorders and fight to stop self-harming with her completing a stint in rehab in 2011 to deal with her problems.

The pop star - who also lives with bipolar disease - is always disappointed with her peers who are guarded as she believes those in the public eye have a responsibility to ''do something good''.

Demi said: ''I see some artists that don't say anything because they want to be politically correct. It's frustrating because they have the ability to reach millions of people and do something good, rather than not saying anything. Politics too, it's very tricky when it comes to politics in the US right now. If you're a megastar, have millions of followers on Instagram or Twitter, and you're not speaking about things that need to be spoken about, you're not helping anyone.

''My fans have been able to relate and look at [me] and say, 'If she can get through it, I can too.' I needed that growing up, and having that positive response to just being open and honest is really rewarding. I no longer have secrets that I have to hide. It's all out there. The fact that people accept me no matter what I've done is really beautiful.''