. >>> coming up, what you never knew about tim burton's "a nightmare before christmas." hey! my natural barrier, so i can lock in moisture... and keep us protected. we've got to have each other's backs... and fronts. cerave. what your skin craves. >>> consideration provided by -- ♪ >>> that's the mastermind behind "rudolph the red-nosed reindeer" probably never dreamed we would be singing it this much later. it was technically a tv special when it debuted in 1964. it has aired every year since. >> and did you know it also inspired tim burton's "the nightmare before christmas"? i know, i know, i know. in turn the inspiration behinds gwen stefani's costume this year. and here's some mngores you may not know about "nightmare." sweet dreams, right? >> bye, everybody. >> what's this? what's this. >> it took three years to complete this stunning 74 minutes of stop-motion animation. it was filmed on 19 sound stages with 230 sets and 227 individual puppet characters. jack cancelington had 400 heads to show his emotion. >> like making a live-action movie in slow motion really. >> i ge