Her career officially launched in 2000 when she was featured on the cover of Vogue Italia and has since campaigned for major brands such as Chanel, Dior, Dolce & Gabbana, Gucci, Armani, Louis Vuitton, Prada, and Versace. Ranked as the number one model on models.com from 2007 to 2010, Zimmerman has been since placed at number 14 on the site's "Top Model Icons of All Time" list. The blond, blue-eyed model has recently appeared in Lady Gaga's "Born This Way" music video.