World's toughest 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 champagne bubble.
If you squeeze me,i'll pop.
If you look at me,you'll pop.
Can you guess this riddle?

N.B. 95% of Harvard Graduates can't solve it. Yet many kindergarteners can