Justin Drew Bieber is a Canadian singer and songwriter.
I know a little about him but not much, didnt he start on Youtube
After a talent manager discovered him through his YouTube videos covering songs in 2008 and signed to RBMG, 
and then he became a huge star
Sure! Bieber released his debut EP, "My World", in late 2009.
does he still make music today?
Yes! The certified platinum in the U.S.
oh wow, how old is he now?
Bieber became the first artist to have seven songs from a debut record chart on the "Billboard" Hot 100.,such a great feat!
it really is, I dont listen to his music, but I have heard he is quite talented