Sorry to hear that Ron Palillo, aka Arnold Horshack of TV's "Welcome Back, Kotter," has died. He was just 63. People reports that he suffered an apparent heart attack and was found by his longtime companion, Joseph Gramm. Something tells me Vinnie Barbarino is going to need a massage to console himself, his second classmate of his to die this year. Was so fun seeing Palillo playing himself on "Ellen" in the '90s. May he rest in peace. Read my friend Johnny Diaz's obituary of the sweathog HERE.