The Duplicate (2001)

What would you do if someone was living your life better than you were?

Journalist Karen Addams is fighting to keep her sanity -- it appears someone else has assumed her identity and is living her life better than she ever could. Losing a grip on her romance, her career and her friendships, Karen struggles to get her life back by exposing the impostor. But things take an unexpected turn when she discovers the true enemy is within herself!