Rihanna says her next album will be 'unexpected'

Singer Rihanna has said her new album will be unexpected and she feels "really optimistic" about it in a rare interview. "I know it's not going to be anything that anybody expects," she told Harper's Bazaar."And it's not going to be commercial or radio digestible. It's going to be where my artistry deserves to be right now."The 37-year-old has kept fans waiting for years for her new album. Her eighth studio…