Suggestions by @abba_mammamia

Julie Walters

as Rosie Mulligan in Mamma Mia! 3

Score: +2

Cher

as Ruby Sheridan in Mamma Mia! 3

Score: +1

Colin Firth

as Harry Bright in Mamma Mia! 3

Score: +1

Stellan Skarsgård

as Bill Anderson in Mamma Mia! 3

Score: +1

Pierce Brosnan

as Sam Carmichael in Mamma Mia! 3

Score: +1

Dominic Cooper

as Sky Rymand in Mamma Mia! 3

Score: +1

Amanda Seyfried

as Sophie Sheridan in Mamma Mia! 3

Score: +2

Joel Dawson

as Donny Rymand in Mamma Mia! 3

Score: +3

Diego Boneta

as Young Fernando Cienfuegos in Mamma Mia! 3

Score: +4

Lady Gaga

as Young Ruby Sheridan in Mamma Mia! 3

Score: +6

Delta Goodrem

as Olivia Newton John in ABBA Biopic

Score: +4

Reese Witherspoon

as Agnetha Fältskog in ABBA Biopic

Score: -2

Tyler Labine

as Benny Andersson in ABBA Biopic

Score: +5

Joseph Gordon-Levitt

as Björn Ulvaeus in ABBA Biopic

Score: 0