Wasson was born in Irving, Texas. Wasson has appeared on the covers of numerous fashion magazines, including French, Russian, Spanish and Australian Vogue, French Elle, Flair, Numero, Allure, and Esquire. She has worked with photographers such as Steven Meisel, Nan Goldin, Mario Testino, Peter Lindbergh, Patrick Demarchelier and Ellen Von Unwerth.
Wasson has walked the runways for Balenciaga, Loewe, Givenchy, Miu Miu, Alexander Wang, Chanel, Shiatzy Chen, Giorgio Armani, DKNY, Roberto Cavalli, Gucci, Anna Sui, Karl Lagerfeld, Alexander McQueen, Calvin Klein, Céline, Louis Vuitton, Badgley Mischka, Dolce & Gabbana, Lanvin, John Galliano, Marc Jacobs, Fendi, Jean Paul Gaultier, Valentino, Jil Sander, Versace, Alberta Ferretti, Oscar de la Renta, Dior, Max Azria, Diane Von Furstenberg, Hugo Boss, Moschino, Carolina Herrera, Dries Van Noten, Prada, Christian Lacroix, Balmain, Yves Saint Laurent, Michael Kors, Helmut Lang, Tommy Hilfiger, Zac Posen, Hermès, Chloé, Isabel Marant, Stella McCartney, Giles Deacon, and Ralph Lauren. She also walked in the Victoria's Secret Fashion Show in 2007.
She has appeared in advertising campaigns for Gucci, Chanel, Dolce & Gabbana, Michael Kors, DKNY, Valentino, Céline, Hugo Boss, Balenciaga, Giorgio Armani, Roberto Cavalli, Paco Rabanne, Blumarine, Cartier, Jil Sander, Alberta Ferretti, Tiffany & Co., Jean Paul Gaultier, Elie Saab, Ann Taylor, Esprit, Rolex, Tiffany & Co., J.Crew, Levi's, H&M, Abercrombie & Fitch, Gap, Scanlan & Theodore, and Zadig & Voltaire. Since 2002, Wasson has been the international face of Maybelline, Clinique and Max factor appearing in print ads and television commercials for the cosmetics brands.
In the fall of 2008, she appeared opposite Justin Timberlake in a multimedia campaign for his clothing line, William Rast. The campaign includes a series of short films directed by Jonas Akerlund; Wasson plays Timberlake's love interest, Birdie. She also appeared in the 2011 Pirelli Calendar, photographed by Karl Lagerfeld.
Wasson appeared as the vampire Vadoma in the 2012 horror film Abraham Lincoln: Vampire Hunter.
In 2012 she starred in the music video for "Madness" by rock trio Muse.Somewhere (2010)
Abraham Lincoln: Vampire Hunter (2012)
The Society Management - New York City
Elite Model Management - Milan, Paris, Barcelona, Amsterdam, Copenhagen
IMG Models - London, Sydney
Kim Dawson Agency - Dallas