Covers:

1947:

Jan Mazurus

1947:

Bobby Capo

1947:

Desi Arnaz [the first as Perhaps Perhaps Perhaps; English translation: Joe Daris]

1949:

Stargazers [idem]

1949:

Skymasters [idem]

1949:

Tino Rossi [as Qui sait, qui sait, qui sait; later also in film Le Huitième jour]

1949:

Luis Mariano [idem]

1951:

Bing Crosby [as Perhaps, Perhaps, Perhaps]

1958:

Nat King Cole [in Spanish]

1959:

Henry Mancini

1960:

Jorgen Ingmann [the first version as rock instrumental]

1963:

Cliff Richard

1963:

ZZ & De Maskers

1964:

Doris Day [later also in film Strictly Ballroom]

1964:

Trini Lopez

1989:

Connie Francis

1989:

Julio Iglesias

1993:

Celia Cruz

1993:

Koen Crucke

1997:

Cake [as Perhaps, Perhaps, Perhaps]

1998:

Cuarteto Patria & Manu Dibango

1999:

Baz Luhrmann [as Perhaps Perhaps Perhaps]

2000:

Omara Portuondo

2000:

Laura Fygi

2001:

Lila Downs

2006:

Emma Bunton

2006:

Mari Wilson [as Perhaps Perhaps Perhaps; tune BBC sitcom Coupling]

2007:

Ibrahim Ferrer [posthumous duet with Omara Portuondo]

2013:

Andrea Bocelli [feat. Jennifer Lopez]

2013:

Pink Martini

2013:

Natalie Cole

2017:

Gregory Porter