MARC Jacobs is loyal to his friends. Lil' Kim performed at the after-party for his spring 2006 collection the week before she went to jail on perjury charges for 10 months. But while she was inside, Jacobs wrote her every week. He was "a huge supporter when I was in prison," Lil' Kim told StyleList.com. "I decided to buy a coloring book. I'm a huge Bratz fan and I painted the Bratz and made them all wear MARC Jacobs, and sent it to him. He blew it up and framed it, and now it's hanging in his house." NY Post PAGE SIX