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Perhaps leaving the toilet seat up isn't that big of a deal after all. According to a 2010 Pantene survey of 2,000 women, we have better things to get mad at -- like our hair. In fact, during the last month, 54% of us got madder at our hair than our significant other.

Yes, we take our strands seriously. We spend countless hours primping in front of the mirror, getting made-over at the salon, meandering the beauty aisles and perusing magazines with hair envy.

But do you know just how much time and money that amounts to every year? How about over the course of your lifetime? Get ready for some hair-raising statistics:

According to a British survey conducted by Tresemme, the average woman spends a staggering $50,000 on her hair over her lifetime.

Each year, we spend an average of $160 on shampoos and conditioners, $120 for styling products and $520 for haircuts. And for those of us who color our locks, add in another $330 a year.

But money is not the only significant investment we make in our quest for beauty. The amount of time we spend is also astounding when you add it up.

We glamour girls spend an average of one hour and 53 minutes a week washing, blow drying and styling our hair. That may not sound like a lot, but by the time we reach the age of 65, we will have spent more than seven months of our lives on our hair!

Is all of this time and money worth the price of being pretty? Or, is Carly Simon still right 37 years later when she says we're "so vain"?

Meanwhile, check out the celebrity who spent nearly 20 hours on her tresses -- in one sitting!