Other TMS episodes that Male & Female Koozebanians could've appeared in

[TotallySpiesFan]

Male Koozebanian:

Avery Schrieber: in the goodnights, in addition to "Scat Song"
Ben Vereen: in "Pure Imagination"
Vincent Price: in the audience during Talk Spot
Ethel Merman: in the audience during Fozzie's monologue
Steve Martin: in the audience at the beginning of the show and during "Jugglin' Guy"
Dom DeLuise: in "We Got Us"
Bernadette Peters: in "Just One Person"
Cleo Laine: in "Everybody Limbo"
Julie Andrews: in the cold opening
Petula Clark: in "Tomorrow"
John Cleese: in John's final number
Raquel Welch: in the cold opening
James Coco: in "Short People"
Spike Milligan: among the people from 100 countries
Lynn Redgrave: as a bad guy
Shields & Yarnell: in the final number
Linda Lavin: in "Beyond the Blue Horizon"
Dudley Moore: in "At the Disco Dance"
Kenny Rogers: in "Love Lifted Me"
Lola Falana: in "United We Stand"
Andy Williams: in "Green Door"
Diana Ross: in "Reach Out & Touch"
Gene Kelly: in "Singing in the Rain"
Brooke Shields: in "I'm Falling"
Glenda Jackson: as a pirate
Debbie Harry: in "One Way or Another"
Jean-Pierre Rampal: in "Veterinarian's Hospital"
Melissa Manchester: in "Whenever I Call You Friend"
Carol Burnett: in the dance marathon
Gladys Knight: in "Friendship Train"
Linda Ronstadt: in "When I Grow Too Old To Dream"

Female Koozebanian:

Avery Schreiber: in "Scat Song"
Ben Vereen: in "Pure Imagination"
Vincent Price: in the audience during Talk Spot
Ethel Merman: in the audience during Fozzie's monologue
Steve Martin: in the audience at the beginning of the show
George Burns: in George's final number
Bernadette Peters: in "Just One Person"
Elton John: in "Bennie & The Jets"
Cleo Laine: in "Everybody Limbo"
Julie Andrews: in the cold opening
Petula Clark: in "Tomorrow"
John Cleese: in John's final number
Roy Clark: in "Pigs in Space"
Loretta Lynn: in the special opening credits
James Coco: in "Short People"
Spike Milligan: among the people from 100 countries
Shields & Yarnell: in the final number
Linda Lavin: in "Beyond the Blue Horizon"
Dudley Moore: in "At the Disco Dance"
Kenny Rogers: in "Love Lifted Me"
Lola Falana: in "United We Stand"
Andy Williams: in "Green Door"
Diana Ross: in "Reach Out & Touch"
Gene Kelly: in "Singing in the Rain"
Brooke Shields: in "I'm Falling"
Debbie Harry: in "One Way or Another"
Jean-Pierre Rampal: in "Veterinarian's Hospital"
Melissa Manchester: in "Whenever I Call You Friend"
Carol Burnett: in the dance marathon
Gladys Knight: in "Friendship Train"
Linda Ronstadt: in "When I Grow Too Old To Dream"
Roger Moore: in the goodnights

They also could've appeared in the audience, in "At the Dance", and as patients in "Veterinarian's Hospital".