Petra Nemcova

Petra Nemcova arrives at the 19th Annual Elton John AIDS Foundation's Oscar viewing party on Feb. 27, 2011, in West Hollywood, Calif. the supermodel is among the contestants of the spring 2011 season of "Dancing With the Stars."

Keri Hilson, Wyclef Jean and Petra Nemcova attend the Diesel Black Gold Fall 2011 fashion show during Mercedes-Benz Fashion Week at Pier 94 on Feb. 15, 2011, in New York.

Czech model Petra Nemcova arrives for the premiere of the film "The Third Wave" during the 61st International film festival in Cannes, southern France, Friday, May 16, 2008.

Model Petra Nemcova attends the 2007 G&P Foundation 10th Annual Angel Ball at the Marriott Marquis, Monday, Oct. 29, 2007, in New York.

Haitian-American musician Wyclef Jean, left, and model Petra Nemcova attend the inauguration ceremony of a computer lab at a school in Croix Des Bouquets, Haiti, Monday, Nov. 12, 2007.

Model Petra Nemcova attends the 2007 G&P Foundation 10th Annual Angel Ball at the Marriott Marquis, Monday, Oct. 29, 2007, in New York.

Model Petra Nemcova attends the party following Columbia Pictures' and The Cinema Society's screening of "The Social Network" at the Gansevoort Park Avenue on Sept. 29, 2010, in New York.

Actor Sean Penn, right, and model Petra Nemcova pose on the press line at the Elton John Oscar Party in West Hollywood, Calif. on Sunday, Feb. 24, 2008.

Petra Nemcova arrives at the Fourth Annual Black Ball Concert for "Keep A Child Alive" Thursday, Oct. 25, 2007, in New York.

Model Petra Nemcova, left, and actress Rosario Dawson attend a private dinner hosted by Domenico Dolce & Stefano Gabbana to celebrate the opening of the Dolce & Gabbana Madison Avenue flagship boutique and the launch of its men's fragrance campaign, Dec. 4, 2007, at the Gramercy Park Hotel in New York.

Model Petra Nemcova arrives at the amfAR's annual Cinema Against AIDS 2008 gala at Le Moulin de Mougins, southern France, Thursday, May 22, 2008.(

Model Petra Nemcova arrives for the 2008 amfAR Cinema Against AIDS benefit in Mougins, southern France, during the 61st Cannes International Film Festival on Thursday, May 22, 2008.

Actress Eva Mendes, left, and model Petra Nemcova attends the Heart of Gold Ball at Cipriani's Wall Street, Wednesday, Oct. 10, 2007 in New York. All proceeds from the evening will benefit the Happy Hearts Fund, Necova's charitable foundation to help children affected by the Asian tsunami.

Model Petra Nemcova arrives at Super Saturday 10, a benefit for The Ovarian Cancer Research Fund, at Nova's Ark Project on July 28, 2007, in Water Mill, N.Y.

Model Petra Nemcova wears a goddess gown by Marc Bouwer, her date for the the 25th Anniversary of the Annual CFDA Fashion Awards held on June 4, 2007, in New York.

Petra Nemcova introduces Ludacris at the Live Earth concert held at Giants Stadium in East Rutherford, N.J. on July 7, 2007.

Model Petra Nemcova arrives at the Cinema Against AIDS 2007 in aid of amfAR at Le Moulin de Mougins during the 60th International Cannes Film Festival on May 23, 2007, near Cannes, France.

Actress Liv Tyler, left, chats with Helena Christensen, center, and model Petra Nemcova at a cocktail party for Stella McCartney hosted by Liv Tyler, Helena Christensen and Jessica Seinfeld at Bergdorf Goodman on May 3, 2007, in New York.

Model Petra Nemcova attends the R.S.V.P. To HELP benefit auction at the Tribeca Rooftop Jan. 25, 2007, in New York.

This photo, supplied by the Happy Hearts Fund, shows Petra Nemcova helping Tim Robbins prepare a heart artwork, while waiting to pose for the supermodel's "Big Red Book," at Milk studios on Sept. 15, 2006, in New York. Robbins was one of a number of celebrities posing for Petra's Happy Heart Fund coffee table book featuring iconic personalities and ordinary people who have made extraordinary contributions, photographed by well-known photographers that use the thematic exploration of the color red via poetry, photography and art. Celebrities made the artwork hearts to be auctioned for the charity. (AP Photo/Happy Heart Fund, Brian Moghadam

Model Petra Nemcova blows a kiss to photographers at the AmFAR Gala honoring the work of John Demsey and Whoopi Goldberg at Cipriani 42nd Street Jan.31, 2007 in New York.

Model Petra Nemcova and musician James Blunt arrive at the Global Green USA 3rd annual pre-Oscar party held at the Avalon Hollywood on Feb. 21, 2007 in Hollywood, Calif.

Model Petra Nemcova poses at "The Black Ball," the KCA (Keep a Child Alive) annual fundraiser, Thursday, Nov. 9, 2006, in New York.

American actor Bruce Willis, left, and Czech supermodel Petra Nemcova speak during a news conference from a yacht in the harbor in Cannes, southern France, on Friday, May 19, 2006. Willis and Nemcova announced a project to create a photo book of celebrities for the Happy Hearts Fund, which raises money to aid children in need who have suffered from natural disasters and other causes.

Model Petra Nemcova attends the 132nd Kentucky Derby at Churchill Downs on May 6, 2006, in Louisville, Ky.