Jessie J has launched a passionate attack against online bullying.

The singing star took to Twitter late last night (March 7) to post a series of messages decrying those who seek to cause suffering to others on the internet.

She used the examples of commenting on how people look and the past being brought up as ways people can bully online - and the singer said that it needs to stop. Jessie J said:

"*Thinks* I hate it when some people live in MY past... Just live in YOUR present and plan YOUR future... If I haven't spoken about certain things for years then what makes you think you can?! It's just weird! Move on because I have...

"Infact I'm fed up of the people who spend their days commenting on peoples pictures being rude and being completely irrelevant to what and who is in the picture. And it always being ignored. Imagine someone commenting on the way you look 24.7 (no one is perfect) or bringing up your past all the time of things you are trying to move on from. The bullying online needs to stop! It's disgusting and it's becoming ok for it to be put into the category "haters" no it's being a bully. #stoponlinebullying."

The 'Domino' icon continued: "We all have our moments of being fed up of it but give me your hand and I'll hold it. If you are being bullied I am thinking of you. You are not alone and it will get better. Don't let them win. It's okay not to be okay. And it's not a matter of "ignoring the haters and be strong it will be ok" if we ignore it, it wont stop! I am making a stand for the people who do not feel strong enough to say something. The young people I meet who are broken by bully's online who think its ok to feel powerful by ripping peoples security's apart and continuously talking about their personal choices like its open for public debate! We should shout that we won't put up with it!"

Watch Jessie J prepare to shave her head for charity below: