Nicole Kidman has bad hair. I've had this discussion with so many women - and everyone is quick to defend the Aussie Anorexic. Ladies - this is her real hair. The hair you see in movies and on the Red Carpet (and think is beautiful and perfect) - it's all lace-front WIGS!
Sadly, Nicole's real hair is thinning from malnutrition and has gone prematurely gray. You can practically see her pulse, it's so thin. Redheads don't have it easy when it comes to hair - they actually have the least amount of hair strands to begin with, and it's very fine hair.
Compare this hair with the wigs we always see her in. Also notice how some sort of fringe is always used to better disguise the wig at the hairline.