To celebrate the 42nd birthday of France's fashionable First Lady Carla Bruni-Sarkozy on December 23, we take a look back at her best and worst fashion moments.

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Carla Bruni Style Evolution
Political spouses in the US are expected to keep a low profile and support their significant other, ideally in a red suit (or blue, depending on the affiliation. But French First Lady Carla Bruni-Sarkozy, a musician and a former supermodel, always keeps things stylish.
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Phil Walter, Getty Images

Style Evolution of Carla Bruni

Pittsburgh, September 24, 2009
Nicolas Sarkozy and Carla Bruni arrive at the Pittsburgh airport to attend the G-20 summit. Bruni wears a beige dress and matching button-down coat, with a coral bag thrown in for a little color.

Paul J. RIichards, AFP/Getty Images

New York, September 23, 2009
Bruni wears a simple black 3/4 sleeve dress to the 64th General Assembly at the U.N. Thanks to her stellar figure (and low-key accessories like a shiny belt and ballet flats), she makes it dressing up look easy.

Timothy A. Clary, AFP/Getty Images

New York, September 21, 2009
Carla Bruni-Sarkozy steps out on the streets of New York with husband Nicolas. The First Lady of France looks absolutely stunning in her silver dress.

James Devaney, WireImage.com

Spain, April 27, 2009
Bruni-Sarkozy met Princess Letizia of Spain. The European first ladies dressed up for a gala dinner at the Zarzuela Palace outside Madrid. Bruni went for classic, Audrey Hepburn-esque glamour in a black backless dress, while the Princess donned a dress befitting of her title - an eggshell blue satin gown with a glittering train.

Carlos Alvarez, Getty Images

This week marks Bruni-Sarkozy's inaugural visit to the U.S. as First Lady of France. Since marrying French President Nicolas Sarkozy in February after a whirlwind romance, Madame Sarkozy has charmed diplomats, heads of state and even the notoriously critical French public.

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The First Lady and President Nicolas Sarkozy in New York on September 23, 2008. In town for the United Nations General Assembly, Sarkozy was given the "World Statesman Award."

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Keeping up with Carla: Bruni-Sarkozy puts her hubby through his paces on the streets of NYC on September 22, 2008. Later she joined U.S. First Lady Laura Bush for lunch at a museum.

ERIC FEFERBERG/AFP/Getty Image

Madame Bruni-Sarkozy (in a purple Christian Dior suit) looks a bit shocked at a Bastille Day ceremony in July. Earlier that week, the singer/songwriter did the seemingly impossible and startled French sensibilities with her new album, on which she sings "You are my junk. More deadly than Afghan heroin. More dangerous than Colombian white (powder)," adding: "My guy, I roll him up and smoke him."

Francois G. Durand/WireImage

On the same album Bruni-Sarkozy sings that "I am a child/ Despite my 40 years/ Despite my 30 lovers/ A child," which must have been a great conversation starter when she and her husband welcomed Pope Benedict XVI and a contingent of priests from the Vatican in early September.

Francois G. Durand/WireImage

Earlier this summer, Bruni-Sarkozy played hostess to another religious leader. The Dalai Lama showed the retired super model the proper way to wear a Tibetan prayer shawl.

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