Aww! Justin Bieber had the most adorable surprise for his fan

We have just gained some serious respect for Biebs after watching this clip from Knock Knock Live. 

This TV show is a Ryan Seacrest production which sees celebrities help out families in need across America. 

On this week's episode, Justin surprised Noah, a fan of his who has down syndrome, and the rest of his family. 

At the beginning of the clip, Justin says he is there to give them some love and see what he can do to help. The 21-year-old visited the family where he chatted with them before handing over a cheque for €45,000, seriously generous!

Justin then prompts the father and son to perform a song for him which is so adorable. "I heard you were a rapper.. could you guys do something for me?"

The singer was really moved by the experience and said it almost brought tears to his eyes, he said "Noah is an inspiration to a lot of kids with disabilities and a lot of kids who are struggling to fit in"