RockBible on Instagram: "Frank Sinatra, 45 years old at the time, seemed to be threatened by the success of the younger Presley, but with the encouragement of his daughter, Nancy, agreed to join forces with 25-year-old Presley, knowing that the appearance would help his show’s ratings. A hint of condescension was apparent when, after Presley performed two numbers, Sinatra came onstage to join Presley on a duet. “You do ‘Witchcraft’ and I’ll do one of the other ones,” said Sinatra, to audience l
