Demi Lovato has one rule when it comes to exes – let them go! The I Love Me singer, who dated Wilmer Valderrama, and Joe Jonas recently opened up about why it’s important for her to cut ties with the people she is no longer with. “I kind of used to have this mentality that if I had a negative experience with someone, I always needed to mend it or I always needed to make things right,” the 27-year-old told Jameela Jamil.