The World's Hardest Riddle... can you guess it?

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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 cannot figure this riddle out, but 84% of kindergarten students were able to figure this out, in 6 minutes or less. can you guess the riddle? trust me, it was the simplest thing you wouldn't have guessed.