Mariah Carey mentioned many relationships in her new memoir, but her ex-fiancé James Packer didn’t make the pages. In a recent interview, the singer gave a harshly honest reason for why the Australian billionaire wasn’t discussed in “The Meaning of Mariah Carey.” Packer, 53, proposed to Carey, 50, in January 2016 after six months of dating.The couple reportedly split in October that same year.