Mazur began modeling and acting in her teens. One of her most well-known ad campaigns are the three TV commercials for Gap she did with director Pedro Romhanyi in 2002: "Everybody in Cords", "Everybody in Leather" and "Everybody in Vests". She has appeared in a number of widely released films in the past several years, including Monster-In-Law and Just Married. She has also appeared in several television shows, including CSI: Miami, Cold Case, Jack & Jill, Strange World and Party of Five.