Bruni in musical tribute to Mandela

France First Lady Carla Bruni performs for the 91st birthday concert for Nelson Mandela. (REUTERS)

France First Lady Carla Bruni performs for the 91st birthday concert for Nelson Mandela. (AFP)

France First Lady Carla Bruni performs for the 91st birthday concert for Nelson Mandela. (AFP)

Carla Bruni and Dave Stewart perform at Radio City Music Hall for the 91st birthday concert for Nelson Mandela. (AFP)

France First Lady Carla Bruni performs for the 91st birthday concert for Nelson Mandela. (AFP)

France First Lady Carla Bruni performs for the 91st birthday concert for Nelson Mandela. (REUTERS)

French first lady Carla Bruni has been named 'The coolest person of the year' in a poll. The 40-year-old hit headlines this year when she met the Queen and saw a nude portrait of herself fetch 45,000 pounds. (AFP Photo/Pierre Guillaud)

A nude portrait of French President Nicolas Sarkozy's wife Carla Bruni is seen here in this undated handout photo from Christie's auction house. It was taken in 1993, when Carla was one of the world's top fashion models. It is expected to fetch $3,000 to $4,000 when it is sold in New York on April 10. (Reuters/Christie’s Images Ltd. 2008)

Supermodel Carla Bruni wearing a sheer dress for Dolce & Gabbana for their Spring/Summer 96 collection October 8, 1995 in Milan. (Reuters/Stefano Rellandini)

Carla Bruni displaying a short dress with dove designs during a show by French designer Yves Saint Laurent on the pitch at the Stade de France before the World Cup final in Paris July 12, 1999. (Reuters/Desmond Boylan)

Italian supermodel Carla Bruni presents Christian Dior's Fall/Winter ready-to-wear show a Gianfranco Ferre creation (AFP Photo/Pierre Guillaud)

Model Carla Bruni presenting this long fake fur coat worn with matching underpants as part of British designer Vivienne Westwood's Autumn/Winter ready-to-wear fashion collection. (Reuters/Christine Grunnet)

Italian model Carla Bruni presenting a pink evening gown designed by Gianni Versace for the Haute-Couture 1996 Spring/Summer collection in Paris. (AFP Photo/Gerard Julien)

Italian model Carla Bruni displaying part of Italian designer Gianni Versace's Autumn/Winter 96/97 collection at a Milan fashion show March 7, 1996. Milan's ready-to-wear fashion shows end on March 8. (Reuters/Stefano Rellandini)

Italian top model Carla Bruni for French fashion designer Yves St. Laurent presenting this short black and gold strapless cocktail dress as part of his Autumn/Winter 1995 High fashion collection July 12, 1995. (Reuters/Pascal Rossignol)

Italian supermodel Carla Bruni presents Christian Dior's Fall/Winter ready-to-wear show a Gianfranco Ferre creation (AFP Photo/Pierre Guillaud)

Italian model Carla Bruni brandishing a whip wearing a black dress by 'Dolce & Gabbana' during a fashion show at Naovan Square in Rome. (AFP Photo/Claudio Onorati)

Italian model Carla Bruni displaying the latest from Blumarine's collection for Autumn/Winter 96/97 at the Milan fashion show on March 6, 1996. (Reuters/Stefano Rellandini)

Italian top model Carla Bruni presenting this short white plastic cocktail dress with transparent sides as part of Italian designer Gianni Versace's Autumn/Winter 1995 fashion collection July 8, 1995. (Reuters/Gareth Watkins)

Italian supermodel Carla Bruni presents Christian Dior's Fall/Winter ready-to-wear show a Gianfranco Ferre creation (AFP Photo/Pierre Guillaud)

Italian model Carla Bruni performing in Paris. Carla Bruni could soon become France's new first lady. (AFP Photo/Bertrand Guay)

A member of staff cleans a Lancia Delta in front of a TV screen showing ex-model and France's first lady Carla Bruni Sarkozy during the second media day of the 78th Geneva Car Show at the Palexpo in Geneva March 5, 2008. (Reuters/Denis Balibouse)

Italian top model Carla Bruni for French fashion designer Christian Lacroix presenting a blue and grey dress with plunging neck line and matching embroidered jacket as part of his Autumn/Winter 1994 high fashion collection July 21, 1994. (Reuters/Gareth Watkins)

Italian model Carla Bruni arrives at amfAR's Cinema Against AIDS 2007 event in Mougins during the 60th Cannes Film Festival. (Reuters/Yves Herman)

Carla Bruni walks for French designer Christian Lacroix in 1997. (Reuters/Photo)

French President Nicolas Sarkozy, his girlfriend Carla Bruni and her young son visit Petra. (AFP Photo/Yussef Allan)

Frances's first lady Carla Bruni arrives for a state banquet at the Guildhall in London March 27, 2008. Bruni and her husband, French President Nicolas Sarkozy, were on the second day of a state visit. (Reuters/Stephen Hird)

Italian top model Carla Bruni for French fashion designer Yves St. Laurent presenting this short black and gold strapless cocktail dress as part of his Autumn/Winter fashion collection. (Reuters/Pascal Rossignol)

France's President Nicolas Sarkozy (L) and his new girlfriend, Carla Bruni, walk together during a visit to the Giza pyramids in Cairo. (Reuters/Nasser Nuri)

French President Nicolas Sarkozy and his model-turned-singer girlfriend Carla Bruni posing near the Great Pyramids of Giza, on the outskirts of Cairo. (AFP Photo/Khaled Desouki)

Carla Bruni taking part in the opening ceremony of the 2006 Winter Olympics at the Olympic Stadium in Turin. (AFP Photo/John D Mchugh)

Italian model Carla Bruni arrives at amfAR's Cinema Against AIDS event in Mougins during the 60th Cannes Film Festival. (Reuters/Yves Herman)

A nude portrait of French President Nicolas Sarkozy's wife Carla Bruni is seen here in this undated handout photo from Christie's auction house. It was taken in 1993, when Carla was one of the world's top fashion models. It is expected to fetch $3,000 to $4,000 when it is sold in New York on April 10. (Reuters/Christie’s Images Ltd. 2008)

Frances's first lady Carla Bruni arrives for a state banquet at the Guildhall in London March 27, 2008. Bruni and her husband, French President Nicolas Sarkozy, were on the second day of a state visit. (Reuters/Stephen Hird)

France's President Nicolas Sarkozy (C) and his new girlfriend former supermodel Carla Bruni, sit together during a visit to the Valley of the Kings, near Luxor. (Reuters/Benoit Tessier)

Italian top model Carla Bruni presents this off the shoulders sweater and leather look skirt as part of Spanish-born designer Paco Rabane's Autumn/Winter ready-to-wear fashion collection. (Reuters/Charles Platiau)

Italian top model Carla Bruni presents black velvet kneepants and matching jacket as part of French designer Yves Saint-Laurent's Autumn/Winter ready-to-wear fashion collection. (Reuters/Jack Dabaghian)

Top model Carla Bruni poses during a fashion-show in Munich. (Reuters/Jan Pitman)