Aw, what a sweet guy!
A spokesman at the hospital spoke about the patients' excitement to see Justin:
"When people like Justin Bieber take the time to come and visit our patients it gives them a tremendous boost and really cheers everyone up.
Patients on the oncology ward undergo rigorous treatments and you can actually see in the children what a difference it makes to have a visitor they admire from the world of entertainment or sport."
The Biebs took the time to chat with patients individually and signed some autographs.
Good work, Justin! We're sure you really brightened up everyone's day!
[Image via WENN.]