world's hardest riddle?

Because the pressure at the poles is low, it's going to be colder, causing lots of snow. The polar bears are white to help them camouflage! So I agree it's pressure.

The poles are furthest from the sun.

The answer is pressure because


I turn polar bears white (fur is white because they adapt to the altitude)
and I will make you cry. (Peer Pressure)
I make guys have to pee (Pressure in Bladder
and girls comb their hair. (Peer Pressure to look good)
I make celebrities look stupid (Pressure from Stress)
and normal people look like celebrities. (Peer Pressure makes you want to look nice)
I turn pancakes brown (Heat from Pressure)
and make your champane bubble. (Air Pressure)
If you sqeeze me, I'll pop. (Squeeze a container.. the Pressure will make it pop
If you look at me, you'll pop. (Peer Pressure, You could freak out under the pressure of everybody looking at you)

I turn polar bears white

Soap

But they still can't build up if there's no time to let them build up... right?

The answer to the riddle is "pressure."