'I know at first hand how the impact of being bullied as a teenager can quite literally last a lifetime,' said the singer.
'I thought that if we could involve well-known ISPCC ambassadors perhaps people will think twice about bullying or indeed allowing bullying to happen.'
The campaign comes as the ISPCC announced it received around 2,300 calls a day from young people, with a quarter of these relating to abuse and bullying.
Have a look at the stars and their bruises in our gallery below...
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