Are you referring to Mamma Mia the song, the stage production or the film? The film features these musicians:
Benny Andersson was of course an original Abba member and Gunnarsson, Lindvall and Wellander were all part of the real Abba's backing band.
All of the songs in "Mamma Mia" were created by ABBA. It was ABBA's greatest hits that created the inspiration for the "Mamma Mia" story.
"Mamma Mia" was based on ABBA's biggest hit songs and were combined to create a story. So the theme for Mamma Mia would be the ABBA songs.
Mamma Mia was on the third Abba album called ABBA, released in the fall of 1975,
ABBA
abba
All of the songs in "Mamma Mia" were created by ABBA. It was ABBA's greatest hits that created the inspiration for the "Mamma Mia" story.
"Mamma Mia" was based on ABBA's biggest hit songs and were combined to create a story. So the theme for Mamma Mia would be the ABBA songs.
Mamma Mia was on the third Abba album called ABBA, released in the fall of 1975,
abba
ABBA
Abba!
If you mean who sung the song Mamma Mia in the movie Mamma Mia that would have been Meryl Streep who played the role of Sophie's mother Donna otherwise it would have been ABBA
March 1975
abba fans?
My vote is for Mamma Mia.
March 1975
The band ABBA of course!