The Doofenshmirtz family has a tradition of hiring groups of identical-looking women to perform as background singers when they are singing. They are typically young and blonde.
Heinz Doofenshmirtz has hired women like this for the following songs:
- "Impress My Professor", describing his troubles as a youth being taught and mistreated by Dr. Gevaarlijk. ("Oil on Candace")
- "Charmed Life", where he as Emperor in an alternate future answers the question "how does it feel to wield such absolute power?" ("Phineas and Ferb's Quantum Boogaloo")
- In the song "Back in Gimmelshtump", for the second verse, chorus girls are seen. ("Rollercoaster: The Musical!")
- In "I Really Don't Hate Christmas" Dr. D hired backup singers dressed as Santa Claus who resembled the Radio City Rockettes and the background singers used in "Charmed Life".
- Some singers reminiscent of The Andrews Sisters sung "He's Eviler" during Heinz's Victorian age ancestor, Jekyll Doofenshmirtz's rampage. ("The Monster of Phineas-n-Ferbenstein"), this girls also sung in "Army of Me" in "Night of the Evil Pharmacists".
- Doof uses the dancers in the song "Lies". ("Let's Bounce")
- In the song "Inator Method" ("The Inator Method")
- Different girls sing with a kidnapped Doof in "Talk to Him". ("Lost in Danville")
- Heinz attempted to flirt with one of the singers as he was paying her, but she simply walked away without a word. He was not fazed by this, telling Agent P, "I think I got a shot there." ("Oil on Candace")
- The singers wore stockings and Vaudeville-style boater hats for "Charmed Life" ("Phineas and Ferb's Quantum Boogaloo")
- Evil Carl also used Back up singers in his song: "Evil for Extra Credit".
- In Disney's Phineas and Ferb: The Best LIVE Tour Ever!, a quartet of dancers dressed in blonde wigs with black and green outfits, appear as Doofenshmirtz sings the song One from A Chorus Line. Later, near the end of intermission and starting out Act Two, three of them appear joining children selected from the audience testing Doof's Audience Control-inator and dancing to "Gitchee Gitchee Goo".
- In both "Oil on Candace" and "Lost in Danville", Doof mentions the girls are in a union.
Appearances and references
- "The Monster of Phineas-n-Ferbenstein" (Appears in flashback(s)) (First appearance)
- "Oil on Candace"
- "Phineas and Ferb's Quantum Boogaloo" (Alternate future)
- "Rollercoaster: The Musical!"
- "Phineas and Ferb Interrupted" (In a video)
- "Let's Bounce"
- "Lost in Danville"
- "The Inator Method"
- "Night of the Living Pharmacists"
- "Last Day of Summer" (Cameo)(Appears in flashback(s)) (only the "Lost in Danville" ones)