Justin Bieber Posts 'It Gets Better' Video

'I just wanted to say there's nothing cool about being a bully,' singer says.

Justin Bieber has joined the ranks of stars speaking out against bullying. The 16-year-old American Music Award-winning singer recently spoke to talk-show host Ellen DeGeneres about his own bullying experience, and in an "It Gets Better" clip that debuted on DeGeneres'

site on Monday, he urged his fans to take action if they see someone being bullied.

In the 20-second video, Bieber, wearing a black T-shirt and backward black baseball cap, says, "Hey guys, I'm Justin Bieber. I just wanted to say there's nothing cool about being a bully. And if you're getting bullied, make sure to tell someone and, you know, it gets better. And if you're a bystander, make sure to step in and, you know, help out."

The clip appeared to have been filmed during Bieber's appearance on DeGeneres' show earlier this month, when he discussed his own experiences with bullying.

"Everybody goes through bullying," he said on the show. "Everybody has, even me. On my YouTube page, there are so many haters. They just say crazy stuff. Like, I'm not mad, I'm 16 and I don't have chest hair. I'm not angry about it at the moment. That will come. People are like, 'Look at him, he puts helium in his voice before he sings.' You just have to laugh at yourself. It's funny." His appearance on the show came shortly after he was reportedly bullied while playing laser tag in Canada in October.

Bieber also had a similar message for those who see bullying going on around them. "There are so many bullies. It goes on so much," he told DeGeneres. "I think that you should ... especially if you are a bystander, you definitely should help out because it could be you next."

In the laser-tag incident last month, a 12-year-old boy allegedly used an anti-gay slur against Bieber after overzealously targeting the "Baby" singer during a heated match.

Bieber joins a long list of stars and politicians who have joined the "It Gets Better" anti-bullying campaign, including President Obama, Secretary of State Hillary Clinton, Ke$ha, Nicki Minaj, Adam Lambert, Aubrey O'Day, Linkin Park's Chester Bennington and Katy Perry, who dedicated her "Firework" clip to the campaign.