But when it comes to denim, the First Lady "beauty pageant" appears to have a new contender: Miyuki Hatoyama, the wife of Japan's Prime Minister, Yukio Hatoyama.
Clad in a black blazer, jeans (of course) and chic black pumps, the 66-year-old First Lady was presented with the Best Jeanist Award today as part of Tokyo Fashion Week, The Australian News reports.
The award, given by the Japanese Jeans Association to celebrities who wear denim, honored Hatoyama for "wearing jeans in a classy but revolutionary style," the association told the paper.
So, what did the lucky winner have to say for herself? "This is the prize I have long wished to win," the source quotes Hatoyama as saying. "I'm a jeans lover. I'm always putting on jeans as they're easy to wear."
When she's not collecting plaques for being a blue jean baby queen, the First Lady -- a former actress -- seems to keep busy raising eyebrows.
According to her Wikipedia bio, she has written about boarding a UFO bound for Venus (who hasn't?) and claims that she knew Tom Cruise in a previous incarnation -- when he was Japanese!
Okay, that we could maybe believe.
This First Lady may win raves for her jeans, but we know a certain world leader -- cough, Obama -- who is getting no love for his mom jeans.