"Butterfly" is a popular song written by Bernie Lowe and Kal Mann and published in 1957. The song is credited to Anthony September as songwriter in some sources. This was a pseudonym of Anthony Mammarella, producer of American Bandstand.

The original recording of the song by Charlie Gracie reached No. 1 on the Billboard chart, No. 10 on the R&B chart and No. 12 on the UK Singles Chart in 1957. A cover version by Andy Williams also reached No. 1 on the Billboard chart in 1957. Williams' version also reached No. 1 the UK in May 1957, where it spent two weeks, and also reached No. 14 on the US R&B chart.

A version recorded by Bob Carroll on Bally Records made the charts peaking at No. 61. The Crests recorded a cover version for their 1960 album, The Crests Sing All Biggies.

...
Wikipedia