Her father is German and her mother is Italian. Habeck was the Playmate of the Month for February 2004 and Playmate of the Year in 2005 (2004 by German Playboy notation) for the German edition of Playboy. She was later the September PMOM in 2006 for the United States edition of the magazine.In November 2005, Habeck was awarded the title Miss Centerfold by readers of the German edition of Playboy, celebrating the 400th issue of the magazine. Janine added to her Playboy résumé in March 2008 when she posed for a Playmate Xtra as part of the Playboy Cyber Club.