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"Kids are always going to be teased," says Carroll, who also sports golden tresses. "Better they be teased for being a smart blonde than a dumb blonde."

To celebrate fair-haired sisters (and, of course, plug a movie opening), the makers of Legally Blonde 2 instituted National Blonde Day on June 30, teaming with Vidal Sassoon salons in 10 cities to give free "Flash of Blonde" hair color treatments.

But if you missed your chance to go gold, you can still let your hair down and enjoy some great moments in blondedom.

Great Moments in Blondedom

1907: A Bottle and a Dream Blond hair dye first hits the market, thanks to French chemist Eugene Schuller.

1911: The Original Blond Bombshell Jean Harlow is born. In 1930, Howard Hughes cast her as the leading lady in the epic WW1 aviation drama Hell's Angels, and she rose to the highest echelons of stardom. She cemented her reputation in Platinum Blonde and became "The It Girl" in the 1933 Hollywood satire Bombshell, going on to such classics as Dinner at Eight and Libeled Lady.

1928: My Little Chickadee Mae West becomes the toast of Broadway in Diamond Lil. The bawdy actress went on to coin such quips as "Is that a gun in your pocket or are you just glad to see me?," "When I'm good, I'm very good, but when I'm bad, I'm better," and, of course, "A hard man is good to find." West would later say, "I believe in censorship. After all, I made a fortune out of it."

1930: A Blond Strip Queen Dagwood meets Blondie as the Blondie comic strip debuts. Dagwood then spends eternity consuming monstrous sandwiches and sleeping face-down on the sofa.

1946: Workin' 9 to 5 Dolly Parton is born. She becomes one of the most successful country music recording stars, not to mention the namesake of an amusement park and the world's first cloned sheep.

1953: Some Like It Hot Marilyn Monroe is featured on the cover of the first Playboy magazine. Over the next 50 years, 46 percent of all centerfolds would be blondes. Their average age: 22. Average weight: 115 pounds. Average height: 5-foot-6. The most common sign was Libra and their top ambitions were acting, modeling, and finding happiness. Monroe would be posthumously named People magazine's Sexiest Woman of the Century.