The X Factor Demi Lovato reveals she has discovered an unknown half-sister 03/07/2013 Demi Lovato revealed in a New York radio interview she recently discovered she has an older half-sister. Read More RELATED NEWS Normani Kordei thanks Nicki Minaj for support after Tiffany Haddish's Fifth Harmony dissMTV VMAs: Camila Cabello, Cardi B and Jennifer Lopez land big winsFifth Harmony announces indefinite hiatus to pursue "solo endeavors" TAGS: The X Factor Demi Lovato