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 champagne bubble.
If you squeeze me, I'll pop.
If you look at me, you'll pop.
Can you guess the riddle?

97% of Harvard graduates can not figure this riddle out, but 84% of kindergarten students were able to figure this out in 6 minutes or less. Can you guess the correct answer?