I need to know the answer to this riddle!!!?

Ok this riddle is all over the internet, and I don't know anyone who knows the correct answer. Can anyone help me out? Here goes:

I turn polar bears white and I will make you cry.

I make guys have to pee and girls come their hair.

I make celebrities look stupid and normal people look like celebrities.

I turn pancakes brown and make your champagne bubble.

If I squeeze you, I'll pop.

If you look at me, you'll pop.

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 riddle? I sure couldn't!!

I need to know the answer to this riddle!!!?

PRESSURE!

Polar bears are white because the pressure at the poles is low, so they have to be able to absorb heat.Pressure makes you cry if it's too much.Pressure in your bladder makes you have to pee.Peer pressure makes girls comb their hair...Otherwise we wouldn't bother!Celebrities usually crack under pressure.Many normal people will shine under pressure.Pancakes turn brown thanks to pressure generated by the heat.Champagne will bubble until the pressure of the carbonation has disappeared.If you squeeze something under pressure, BAM, there it goes.If you are "looking" at pressure, you're in it, like in an airplane, and your ears pop.

I need to know the answer to this riddle!!!?

eyes

I need to know the answer to this riddle!!!?

hormones