1980-2001 With nearly ten millennia of hairstyles to choose from, almost anything goes as the year 2000 approaches. Bald works in the 1980s, following the lead of Sinead O'Connor, NBA superstars, and the ever-stylish Queen Nefertiti. And braids explode in the 1990s, modeled in stunning variety by a new wave of West African immigrants and still more NBA superstars. Even disheveled has its moment, as the mod crowd awakens from two years of millennium parties to cultivate "bed head" glamour. Long or short, stuffed beneath a baseball cap or piled high on chopsticks, modern hair reaches for the skies.