She is best known for her role as the Mexican-American DJ Carmen de la Pica Morales in the Showtime drama television series The L Word, which she joined in its second season. Shahi did not renew her contract with the series for the fourth season, and consequently her character was written out. She makes a guest appearance on the last episode of the series.
Shahi speaks English, Persian, and some Spanish. She lived with her mother after her parents divorced and has a brown belt in karate.
Shahi was married to actor Steve Howey, whom she met when she guest starred on Reba. They were engaged in June 2007 while vacationing in Hawaii, and married on February 6, 2009 in Las Vegas. On July 9, 2009, their first child, William Wolf Howey, was born, weighing 8 lbs, 6oz and measuring at 21 inches in length. Shahi gave birth during an at-home water birth. According to Shahi's official myspace, she is single and she and Howey are no longer together.
Shahi has an older brother and a younger sister, Samantha Jahansouzshahi.
She currently lives in Los Angeles, California.