LORELAI: Oh God, I hope they [Richard and Emily] go [on vacation] over Christmas. That would be as holly jolly as it gets.
A reference to “A Holly Jolly Christmas”, a 1962 Christmas song written by Johnny Marks. First recorded by the Quinto Sisters, it was featured in the 1964 animated Christmas television special Rudolf the Red-Nosed Reindeer.
It was sung by Burl Ives, who was also the narrator, and released on the soundtrack album. Burl Ives re-recorded it for his own Christmas album, and released it as a single. Of enduring popularity, the Burl Ives version continues to chart on the current charts, and has peaked at #4 in the years since 1998.