Yep, that's her.
I recall A Daytime to Remember with Reba McEntire, but I don't remember a specific anniversary celebration. I kind of suspect JFP may have folded it into the primetime episodes with Todd holding everyone hostage at the Buchanan lodge - that would be like her.
From the very weird 35th in Malone and Griffith's very weird 2003 - I honestly can't remember much beyond (yet another) OTT gothic fantasy episode in which Natalie and Cristian face hallucinatory fears and doubts about their upcoming wedding, including goofy clip montages of 'those who have loved and lost in Llanview.' Natalie and Cris had been super popular in 2001-2, but were severely backburnered most of the year in favor of Bree's Jessica, Antonio, Mitch, Jen, Flash/Sarah, Walker/Todd, etc. (Flash is already getting backburnered by this episode due to her disastrous intro story with Joey - she went on to spend most of her time with Riley and Asa before exiting the following January.) Natalie and Cris didn't get major airtime again until the fall, with the arrival of John McBain and David Fumero's exit.
Malone and Griffith's answer to everything in 2003-2004 seemed to be another OTT gothic fantasy episode. There's even a few I've probably forgotten. There were too many, even for a kid who had grown up watching Dark Shadows. (And frankly the budget strained worse than DS at times.)