Even celebrities have a hard time with life's challenges. Demi Lovato has struggled with drug addiction and mental disorders for most of her career. At one point, the Anyone singer thought about throwing away her career. Luckily, she gained the strength to continue singing. It's great to see Demi Lovato back in the game and doing what she does best, making great music. To celebrate her comeback in the new year, the relentless singer has made some positive changes in her life.