Hell’s Bells, the title of a season six episode, is an AC/DC song from their album ‘Back in Black’.

In Chosen, Spike says, “Well I think it’s fair to say school’s out for bloody summer.” This is a reference to the Alice Cooper song ‘School’s Out’, which includes the lyric “school’s out for summer”.

Lorne says in Reprise, “Most anything that can manifest in order to move in this dimension can be killed. Kinda the downside to being here. Well, that and the so-called musicals of Andrew Lloyd Webber.”

In Bargaining (Part 1), Anya says the desert gnome in Cairo who sold her the Urn of Osiris also threw in a Backstreet Boys lunch box for Xand…. ahem… a “friend”. Backstreet Boys were an American boy band whose hits included ‘Everybody (Backstreet’s Back)’ and ‘Quit Playing Games (with My …

In The Zeppo, Xander says to the bomb, “Hello, nasty”, a reference to the Beastie Boys album of the same name.

The title of the episode Bewitched, Bothered and Bewildered could come from the song “Bewildered” by Rodgers and Hart, made famous by Frank Sinatra, the lyrics include the lines,
“I’m wild again, beguiled again,
A whimpering, simpering child again,
Bewitched, bothered and bewildered am I.”
This song can also be heard in Woody …

In Help, Buffy says, “Blue Clam Cult”, but she means Blue Oyster Cult, who were a rock band with hit songs such as “Don’t Fear the Reaper.”

Xander and Willow discuss the Captain and Tennille in the episode Ted. Captain and Tennille were a duo who had several hit songs (including ‘Love Will Keep Us Together’ and ‘Come In From The Rain’) in the 1970s, and their own TV show. Xander believes that Toni Tennile was “using” …

In Living Conditions, Kathy plays Cher’s ‘Believe’ over and over:
Kathy: “This song is super fun. Isn’t it?”
Buffy: “You bet. It just gets funner and funner every time you play it.”
In the original script the song was Mariah Carey’s ‘Butterfly’.

In Welcome to the Hellmouth, Buffy tells Thomas the vampire that he looks like DeBarge. She’s referring to the pop group consisting of five siblings who had a hit with ‘Rhythm of the Night’ in 1985.

Buffy says in Lie to Me that she got over her crush on Ford by listening to the DiVinyls 1991 hit “I Touch Myself”. (Willow: “Oh, that’s what that song is about?”)

Fred hangs a poster of the Dixie Chicks in her lab in Conviction (we see the poster again in Shells). Fred also tells Harmony in Harm’s Way, “Anyway, if you want to hang out again sometime, we could grab some wine, jam to the Dixie Chicks.” The Dixie Chicks …

In Tough Love, Xander calls Dawn “Dawn Giovanni”, this is a reference to Don Giovanni, an opera composed by Mozart which was first performed in 1787.

Lover’s Walk, the title of a season three episode, is also the title of an Elvis Costello song.

In I Fall To Pieces Doyle says, “and people who need people are the luckiest”. These are lyrics from the song ‘People’ written by Bob Merrill and Jule Styne, which was sang by Barbra Streisand in Funny Girl.
In The Magic Bullet, Lorne and Connor reference the song again:

Lorne: “You …