Khan is fluent in the Persian, Turkish, Norwegian, English and Urdu. Khan has a bachelor's degree in Marketing & Advertising and two master's degree in International Business and Film & Television. Khan got married to Sahil Khan on September 21, 2004. Their marriage came to an end when they divorced in July 2005. In 2009, Negar had a new romance with someone from India while keeping a low profile.
Khan gained fame when she appeared in the music video of remix of classic Indian Hindi movie song "Chadti Jawani Meri Chaal Mastani". Khan was a contestant of the Norwegian version of the Paradise Hotel reality show, where she was accused of having multiply plastic surgeries. She claimed that she hasn't had any surgery.
Khan allegedly posed topless for a Norwegian men's magazine VI Menn in 2004. She, however, denied and said that the pictures had been graphically manipulated.
She was deported from India to Norway in February 2005 for allegedly providing false documents to procure her work visa. Negar was deported as she was working while on tourist visa. However, Negar and Sahil claimed that she had married Sahil, and hence was eligible to become an Indian national.