For the love of God, will Simon and the other producers please call up Neil Diamond? People still underestimate this guy because he wears shiny shirts, but he has a catalog of songs that spans 50 years, plus he could teach the contestants some showmanship, which has led to Diamond still selling out concerts well into his 60s. ''Sweet Caroline,'' ''Cherry,Cherry,'' ''Holly Holy,'' ''Girl You'll Be A Woman Soon,'' ''Solitary Man'' ... I could go on and on. —Sean