Watch Justin Bieber's awesome free performance for Las Vegas's Whitney Elementary. It's one of the poorest schools, and Justin's helping them out!

He gave them $100,000 and a free concert! Justin explained, "I'm here to bring smiles to these kids' faces. For me, I grew up and I didn't have a lot. We went to food banks to get food for me..If I didn't have my grandparents to help me - these kids have you to help them."

That's so kind of Justin to help!

Source: Just Jared Jr.