The study group recalls the time when they had to step up and fill in for the Greendale Community College Glee Club.

The Glee Club director creates a model of his idea for the Christmas performance and uses the claymation characters from the previous year's Christmas episode.

Inspector Spacetime is a parody of Doctor Who. Abed watches a DVD of the Inspector Spacetime Christmas Special.

The study group joins the Glee Club for the Christmas program. The Glee Club is a parody of the television series 'Glee'.

Twin Peaks is mentioned in the "Baby Boomin' Santa" song.

While wearing the sexy Santa outfit, Annie sings a song to Jeff in the style of Betty Boop.

Jeff comments that nothing says holidays like decorating the 'Hellraiser'.

Troy does a Bob Dylan impersonation in the "Baby Boomin' Santa" song.

Childish Gambino is the rapper stage name of Donald Glover (the actor who plays Troy). Technically there is no direct reference to him, but Troy does do a Christmas rap in this episode.

The Glee Club director is referred to as "equal parts Hanson and Manson".

After the Glee Club director, Mr. "Rad" admits to cutting the brake lines on the bus carrying last year's Glee Club, he shouts "Look! Kings of Leon!" as a distraction so he could run away.

The Beatles and Paul McCartney are mentioned in the "Baby Boomin' Santa" song.

The Beatles and Paul McCartney are mentioned in the "Baby Boomin' Santa" song.

In an attempt to get Pearce to join the Glee Club, the group sings a song about Baby Boomer Santa Claus to the tune of 'Boogie Woogie Bugle Boy'.

The (original) Glee Club sings this song in the cafeteria to announce their Christmas special.

In the musical number, Baby Boomer Santa Claus, the group uses part of the song 'Stayin' Alive' in the lyrics in an attempt to convince Pearce to join the Glee Club.

Abed wanted to spend the holidays with his friends, but was disappointed when everyone had other plans. While watching a science fiction holiday special on TV, the study group arrived at Abed's apartment, singing this song to cheer him up.

The Glee Club does a Hip-Hop mashup of Elton John/Lil Jon, singing 'Tiny Dancer' in an Elton Lil Jon remix.

The end of the episode features several characters singing this song with their faces on Christmas bulbs.