I assume you haven’t heard of him because you aren’t a 14 year old girl. Trust me, they’ve all heard of him.
Obama = President Justin Bieber
I caught my wife listening to one of his songs on YouTube the other day, I immediately hit the reset button on the internet router.
Gladly, I found out a student wanted to sing one of his songs and she wanted to hear it- not that she suddenly regressed a couple of decades.