I taped this last night and dutifully searched for the tickling scene, which occurs one hour into it. Actress Paula Trickey (a fairly hot brunette) is the mom who gets tickled by her two kids and her husband as they are all kneeling around their Christmas tree.
The actual tickling looks stagey and unconvincing (to me anyway). Hubby just seems to noodle his fingers a bit on the back of Trickey's neck while the kids sort of make grabs at her ribs.
There's two separate shots of this as, in between, they cut to Tori Spelling and William Shatner looking on and making comments. The scene clocks in at 6 seconds if you cut out William Shatner's commentary part.
Trickey says, "Stop it! Stop, stop, stop! I give, I give, I give...okay!" as she's laughing. Overall, not great but not bad either for a mainstream tickle scene.
One bonus for Tori Spelling fans. If you fast forward another ten minutes from the tickling scene, you get to see her looking her sexy best in a VERY short, VERY tight little dark gray skirt and jacket ensemble (she plays a TV talk show host).
If anyone can make a clip of this scene (and some still shots of Tori in her short skirt) I'd be willing to send out the tape. Just give me a holler.