According to sources close to the star (who is now eighteen and can do what she pleases, thankyouverymuch Disney), Demi Lovato has given up her world tour along with The Jonas Brothers and has checked herself into a rehab-type facility, where it's said she'll undergo counseling for physical and emotional issues. A rep for Lovato quickly - and loudly - refutes any claims that Demi is, or will be, treated for drug ...