They say this is the world's hardest riddle.
Can anyone figure it out?

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.

90% of Harvard students couldn't figure it...

Jay33