Gene Kelly plays a club owner from the big band era named "Danny McGuire" in both; Danny's backstory in Xanadu sounds suspiciously like a version of "Cover Girl" without the happy ending.
Kira and Sonny wear slickers and carry umbrellas like in the opening title sequence of "Singin in the Rain"
Referenced during cold opening
The "Let's Dance Tonight" battle-of-the-bands sequence bears an uncannily similarity to Xanadu's "Dancin'" sequence; Pia Zadora transforms into a beam of light.
A band on the list is named "The Nine Sisters." That is the name of the group that Sonny Malone asked to paint a cover for in "Xanadu."
Joel sings a variation on the theme song.
Katrina threatens Martin that if she finds out he's cheating on her while she's in rehab, she'll make him listen to the soundtrack to Xanadu until he goes insane, which should probably take about half of side 1.
Mr. James' original concept of his mansion, but without the dorky name
Movie poster at theater.
Peter reminds Asher that Joel Silver also made Xanadu
The title song from "Xanadu" is sung during the closing credits.
Dave invites Isabelle to see the film.
Francie says that Rory is displaying "Xanadu levels of insanity."
Will and Jack have the DVD and talk about scenes in it
"Xanadu" is one of the songs played by Hymnfir.
Lacey mentions this as her favourite movie.
Lorelai calls the inn "a snowy Xanadu of goodness."
While reading a cast list for another film, Gay Perry mentions Michael Beck was the lead in "Xanadu." Joel Silver was the producer for that movie as well.
Justin asks Brian if they should name their estate "Xanadu".
Mentioned by Peter Dragon in clip from episode 2 of Action
title on videotape
Hurley asks Sawyer if he wants to watch Xanadu
Dannii Minogue performs the title song.
This film is referenced during footage of director Robert Greenwald.
Juliet claims that this movie influenced her to learn how to rollerskate.
When asked by his boyfriend William what guys thought they were renting when they got a incorrecting labeled rental video, Michael answers "I don't know, Xanadu?"
It's in a list of movies York likes
mentioned in dialogue
Steve Coogan compares Samuel Taylor Coleridge's Kubla Khan to Olivia Newton John's film Xanadu
Cathy rents this movie
Steve Coogan says "I would have thought you would have preferred Olivia Newton John's version of Xanadu".
Mentioned by Security Guard.
Mentioned by Daniel MacPherson during Olivia Newton-John's introduction.
Shawn says, "We have tickets to a screening of 'Xanadu' at 5:50."
Title referenced by Dave Attell
Barret says she liked Connery in Xanadu, mistaking him for Gene Kelly
mentioned by Maxie
Milk mentions the film when speaking to RuPaul.
Chandler, Joey, and Phoebe are watching it on their new TV.
footage appears throughout
Clips are shown
featured clips behind projector while singing from this movie's songs.
A clip from this film is shown while talking about Robert Greenwald.
A scenes from this film was ranked #2 on Bill's list of the worst in films.
Clips shown in a segment on rollerskating.
DVD documentary about this film
Footage is shown during Ellen's Secret Movie Confession
Reviewed; clips shown.
A sequence was animated by Don Bluth