As he wrapped up his massively successful US tour on Thursday (December 23), Justin Bieber implored his army of teenage fans to give back this Christmas and stuff a bus with gifts for sick children.

The star parked a bus outside Atlanta, Georgia’s Philips Arena and teamed up with local radio station Q100 for the Stuff Bieber’s Bus campaign, which asked fans to give gifts of toys and games for the sick kids at the Children's Healthcare of Atlanta centre.

After the show, Bieber went in person to hand out the presents to the children at the facility.

About getting involved in the project, Bieber said:"I have such a big platform, it would be silly if I didn't do something positive with it. I got contacted by their radio station... (and they) asked us if we wanted to be involved ... and it was just something I thought would be really cool."

Watch Bieber's video for 'Baby' here: