Demi Lovato is celebrating six years of sobriety.<br /><br />Demi has previously battled with substance abuse and self-harm <br /><br />however that seems to be in the past as she uploaded a Tweet to celebrate the milestone.<br /><br />She also told her millions of followers that they can overcome their own problems in life. <br /><br />Demi previously admitted that she's been forced to give up partying as part of her battle against alcoholism, <br /><br />because it can trigger her cravings.<br /><br />And while the ‘Skyscraper’ singer admits that her new life sounds "boring", she's happy to make the sacrifice.<br /><br />Congratulations, Demi! <br /><br />
