Justin Bieber: 'Being able to give back is just so awesome'

Canadian sensation Justin Bieber has revealed that being able to give back to people is the best thing about being in his position.

The 'As Long As You Love Me' superstar surprised two deserving people on 'Knock Knock' this week, one was a a fan who beat cancer and the other was a single father with a son who has Down Syndrome, and told Ryan Seacrest that it was a really moving experience:

"For me to just be there in the moment… I’ve seen it in videos and I’ve seen people after the fact who come through and say, ‘Hey, you helped me get through this tough, time,’ but to be there and go to her house and surprise her, it was awesome. I’ve never felt anything like it."

“I was just talking to [my manger] Scooter [Braun] before and these are the moments when I’m able to do this. She was talking about how she wanted to give up and there’s times I want to stop doing what I do because it gets overwhelming, but I’m reminded of these things and being able to do this for these people is awesome.”

Watch footage of Bieber surprising the fans on 'Knock Knock' here: