It doesn't take much for Justin Bieber to make fans go crazy in concert. His mere appearance does it every time.
But the 17-year old really had audience members screaming during a tour stop this week when he asked what single they wanted to hear. Between shrieks for "Baby,' Justin broke into a couple quick covers.
He sampled "Friday" by Rebecca Black and then "Baby One More Time" by Britney Spears. Eventually, Justin gave in to his ..."