She has appeared in numerous international magazine covers, including Cosmopolitan, Elle, GQ, Harper's Bazaar, Marie Claire, Ocean Drive, Vogue and was the only model to appear on the cover of Glamour in the United States in 2006.
In 2012, Ambrosio was chosen to wear the "Fantasy Bra".
Ambrosio is known for her work with Victoria's Secret and was chosen as the first spokesmodel for the company's PINK line.
"They definitely have a roller coaster of a relationship," an insider previously told Us. The pair have two children together -- daughter Anja, 5, and son Noah, 17 months.
Ambrosio, 32, and Mazur got engaged in 2008 after three years of dating and were spotted together as recently as Tuesday, Oct.
In one photo, the brunette bombshell called the longtime E!
News host both "charismatic" and "handsome." Seacrest dated professional dancer and "Dancing with the Stars" champion Julianne Hough, 28, for three years before calling it quits in early 2013.
courtesy of her smoking hot friends, including Sofia Richie. READ MORE Give Alessandra Ambrosio's Malibu photo shoot a quick glance and you'd think she's giving her lady parts a breath of fresh air ...