8. Gisele Bündchen
Gisele Bündchen turned 25 in 2005, but she began her modeling career back in 1995. She walked in New York Fashion Week in 1996, and within a few years she had worked with designers like Alexander McQueen, Chloé, Dolce & Gabbana, Valentino, and more. She appeared on the cover of American Vogue in July 1999 — right around her 19th birthday. 

From 2000 to 2005, Gisele was in a relationship with Hollywood playboy, Leonardo DiCaprio. In 2006 she linked up with Tom Brady, who she is currently married to with two children.