Though the Todds were the first to record "Chanson," a group called The Fontane Sisters, a New Jersey group, recorded it almost immediately after Art & Dotty. Both were released in March 1958. Here's the Fontanes' version:
By the mid 1960s, the song had been passed around and recorded by many of that era's major monsters of schmaltz: The Lettermen, Sadler & Young, Ray Coniff ... Even The Mills Brothers took a stab at the "Song of Love":
Apparently "Chanson" even made it to ... France. Here's Edith Piaff:
In the mid-'70s, "Chanson" was revived by the retro popsters Manhattan Transfer. The single was big in Europe, though didn't make much of a splash in the U.S., where cynics scoffed, "They're no Art & Dotty!"
I was hoping to uncover some obscure R&B or bluegrass or polka or zydeco or speed metal versions of "Chanson D'Amour" but came up empty-handed. However I did find this gem by The Muppets!
For more deep dives into songs, check out The Stephen W. Terrell Web Log Songbook