Plenty of celebrities have opened up about being bullied in school, but there are some stars like Tyra Banks and Russell Wilson who have admitted that they weren't so nice to their peers growing up.
Click through the gallery to see celebs who revealed they were bullies during their childhood.
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"At nine years old, I was a bully. I was the mean girl: 'Oh you can't hang out with us' - I was that kinda girl who used to say that kind of stuff," she has said.