Kristine Leigh Lefebvre is a lawyer, and was a contestant on NBC's reality show The Apprentice who made it into the final group of six contestants before being fired. The credentials which garnered Kristine a spot on the show include her education and career as an attorney. Her undergraduate degree is from the Metropolitan State College in Denver, and her law degree is from Nova Southeastern University in Florida. As a professional, she has represented celebrities Shaquille O'Neal and Dan Marino as well as the Staples Center sports complex and the Los Angeles Kings hockey team.

Following her appearance on The Apprentice, Lefebvre appeared nude in the June 2007 issue of Playboy as well as on that issue's cover. Incidentally, she was a member of the winning team on the second episode of the Apprentice, in which the task was to design and manufacture a line of swimwear for Trina Turk; Kristine modeled one of the team's swimsuits at a fashion exhibition at the task's conclusion. The reward for winning was a trip to the Playboy Mansion for an opportunity to meet Hugh Hefner and enjoy one of his infamous mansion parties.

According to the article accompanying her Playboy pictorial, Kristine has provided legal expertise and written contracts for several women to have posed for the magazine, including Pamela Anderson and Debbie Gibson.

Lefebvre is a cervical cancer survivor.