20/20 255x45 - Lights, Camera, Christmas! Inside HolidayMovie Classics

The special will include insider details on classic holidayfilms including a casting decision, Jim Carrey'storture-surviving technique training during "How the GrinchStole Christmas"; and a visit to a Vancouver psychiatrichospital, the stand-in for Gimbal's toy department in "Elf."The hour will consider the question of whether favorites suchas "Trading Places" and "Die Hard" qualify as Christmasmovies; and talk to a spokesperson from Rotten Tomatoes todiscuss what it takes to qualify as a Christmas classic. Thehistory of small-screen favorites such as "A Charlie BrownChristmas" and "Rudolph the Red-Nosed Reindeer" will befeatured, as well as interviews with the voice-over artistsbehind these favorite animated characters, and the owner ofthe fully restored Santa and Rudolph puppets.