Last updated at 16:21

Olly Murs on friends who bullied

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As part of Anti-Bullying Week Newsround chatted to Olly Murs, who's no stranger to bullying.

Olly made an effort to make sure his pals at school didn't bully or say hurtful things to other kids either.

He knew that even though his friends thought they were just messing around, the person at the other end of the hurtful comments wouldn't find it funny.