ThE WoRlD's HaRdEsT 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.
Can you guess the riddle?