Demi Lovato talks to Popstar! about her friendship with Miley Cyrus, revealing that she called the ‘Hannah Montana’ star at 4am the previous night because she was homesick. Demi said Miley should guest star on her Disney series ‘Sonny with a Chance’. “I’d love to have her on the show. Maybe she could come back as Hannah Montana,” Demi joked. Watch the brief interview via YouTube below.