It’s like a Bono humanitarian concert for teens and tweens. We Day is an annual youth empowered rally by Free The Children, an organization that aims to fight child labor. This year, We Day started out in two different venues and dates in Canada—September 29 at Vancouver’s GM Place and October 5 at Toronto’s Air Canada Centre. The third and final set will be on November 5 at the Hamilton Place.

Some 16,000 students and teachers attended the musical event. Guest performers such as The Jonas Brothers, Justin Bieber, Hedley and dancers from So You Think You Can Dance Canada were received with ear-splitting cheers from the crowd.

The event wasn’t just about a cool concert. The kids and teens in attendance were in full support of the organization’s cause—to make tangible actions that make a better world, especially for children. Humanitarians, environmentalists, motivational speakers and politicians were greeted like rockstars at the event.

SOS call: The Jonas Brothers made a surprise appearance.

Justin Bieber performed the acoustic version of his hit “One Time” at We Day.

“We share with our team and we truly believe it’s not about us. It’s about the issues and we share that with all the young people,” said Marc Kielburger, one of the founders of Free The Children. “We’re just happy that the young people feel that it’s really cool to get socially engaged and what we’re fighting most of all is we’re fighting apathy.”

“Everyday action is our message and people respond to that message because they’re really searching to bring about a positive change in this world,” added co-founder Craig Kielburger.

With the success of the rally, it looks like the kids heard the message loud and clear.

For more info about helping fight child labor, visit www.freethechildren.com.