Teen pop sensation Justin Bieber met bullied Sydney teen Casey Heynes at his concert in Melbourne on Monday night.
The 17-year-old American singer, who is currently touring Australia, told a crowd of screaming fans: "Everybody give it up for this kid."
"I just wanted to say, he is very inspirational, he shows other people to stand up for what they believe in," he added, before Casey introduced Bieber's next song Never Say Never.
Casey, 15, made headlines after turning the tables on a bully at his high school, body slamming him onto concrete.
The video of him hitting back went viral on the internet.
Bieber has one more show in Melbourne on Tuesday night, before heading to Adelaide and Perth.
Casey's experience at Bieber's show will air on A Current Affair on Tuesday night.