Entertainment & Music: What's the hardest riddle?

Albert Einsteins riddle (Who keeps the fish).

@Paige- That's a good riddle too, but why did you leave off the last line? It is the key to the riddle.

I turn polar bears white

and I will make you cry.

I make guys have to pee

and girls comb their hair.

I make celebrities look stupid

and normal people look like celebrities.

I turn pancakes brown

and make your champane bubble.

If you sqeeze me, I'll pop.

If you look at me, you'll pop.

What has four eyes but can't see? Mississippi.

who is Banksy??