Covers:

1910:

Victor Orch.

1915:

Florentine Quartet

1925:

Shadowland Three

1940:

Wayne King [millionseller US]

1941:

Franklyn MacCormack [as Why Do I Love You; all-nite DJ from Chicago, known for his poetry readings over schmaltzy instrumentals at 4 AM, in this case Wayne King's]

1954:

Billy Vaughn [n°2 US]

1954:

Four Aces [n°3 US; first vocal version; lyrics: Tom Glazer]

1955:

David Carroll [hit US]

1955:

Frank Sinatra [with the Ray Anthony Orch.; hit US]

1955:

Leo Diamond [hit US]

1955:

Ink Spots [hit B]

1955:

Marcel Thielemans [as Zomer-idylle]

1955:

Selvera's [as Zachtjes Glijdt Ons Bootje]

1955:

McGuire Sisters [hit B; later in Robert Altman film Come Back To The Five And Dime, Jimmy Dean]

1955:

Pee Wee King

1955:

Larry Clinton [vocals by Three Belles]

1955:

Sammy Kaye

1955:

Patti Page

1958:

Pat Boone

1961:

Jim Reeves [idem]

1963:

Connie Francis

1963:

Slim Whitman

1965:

Al Martino [B-side of Spanish Eyes]

1970:

Hank Locklin

1984:

Frankie Yankovic

1994:

Gatlin Brothers