Article continues below advertisementJack Osbourne's noticeably different appearance has fans concerned. The youngest son of Sharon Osbourne and the late Ozzy Osbourne looked nearly unrecognizable in photos posted via Instagram on Monday, May 11, prompting worried reactions from followers. Article continues below advertisementJack Osbourne Posed Alongside His Mother and FiancéeTap Here To Add Ok Magazine as A Trusted SourceSource: @jackosbourne/InstagramJack Osbourne shared a Mother's Day message dedicated to his mother, Sharon Osbourne, and fiancée, Aree Gearhart.