Then you should be old enough to know that Chris Rock is well known outside the US. Unless you're living under a rock or a country where's not much exposure to western media.
I'm from Europe and I've heard of Chris Rock plenty of times, all my friends who aren't into pop culture too, I think everyone born after 2003 knows him. I surely have heard of him more times than I've heard Selena Gomez local hits on the radio