First recorded by Charlie Gracie (US #1/R&B #10/UK #12 1957).
Other hit version by Andy Williams (US #1/R&B #14/UK #1 1957).
From the wiki: “‘Butterfly’ is a popular song written by Bernie Lowe and Kal Mann. The song is credited to Anthony September as songwriter in some sources – a pseudonym of Anthony Mammarella, producer of American Bandstand.
“The original recording of the song by Charlie Gracie reached #1 on the Billboard chart, #10 on the R&B chart and #12 on the UK Singles Chart in 1957. A cover version by Andy Williams (‘Moon River‘,’Happy Heart‘)also reached #1 on the Billboard chart in 1957 – his first chart-topping hit. Williams’ version also reached #1 the UK in May 1957, where it spent two weeks, and also reached #14 on the US R&B chart.