Justin Bieber Blasts 300,000 People in Mexico City With a Free Concert [VIDEO]

On his run to perform a bunch of free concerts, Justin Bieber did one in Mexico City. In front of around 300,000 people!

Yeah that's a lot. That's like the entire population of Lubbock, and then some more, all in 1 public square for a show. Talk about port-a-potty problems.