WATCH: Justin Bieber Gives Bullying Victim a Hero's Welcome

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Justin Bieber might not have to defend himself against bullies in school but he does sympathize with those that do and he celebrated one of the most famous bully bashers during a show in Melbourne, Australia on May 2.

"Everybody give it up for this kid," Bieber said as he brought Casey Heynes to the stage.

Heynes, an Australian native, became well-known after a video of him retaliating against a school bully surfaced on YouTube in March.

"I just wanted to say that he's very inspirational," Bieber raved. "He shows other people to stand up for what they believe in."

After the show, the teen heartthrob posted the video to his Facebook page along with this message: "Well tonight we flew Casey and his family into the show...really special kid and a real life hero. Thanks Casey."