Katie sits down for an exclusive interview with LeAnn Rimes -- her first since leaving rehab. She speaks honestly about her childhood, her career and, of course, all those tabloid rumors. Plus, will.i.am, the Black-Eyed Peas front-man is trying to change the world. You won't believe what surprises he has in store for us! And the powerful, heartwarming story that inspired Taylor Swift to write a song, and make a phone call that changed one family's life forever.