Professor enters the classroom the same way every day. Hello!

Humpback whale breaches right on top of kayakers in Monterey Bay, California.

Mexican parade float with mariachi band randomly appears in East Los Angeles.

Ariana Grande performs amazing singing impressions of Britney, Christina, and Celine.

Steven Tyler of Aerosmith sings with a street musician in Moscow, Russia.

Rapper Lil Dicky creates epic music video for his song '$ave Dat Money' without spending a dime.