First recorded by The Rays (US #3/R&B #3 1957).
Other hit versions by The Diamonds (US #10/R&B #6 1957), Herman’s Hermits (US #5/UK #3 1965), Cliff Richard (UK #10 1990).
Also recorded by Frankie Lymon (1960), Bob Crewe (1961), Paul Anka (1961), The Four Seasons (1964), The Nylons (1982).
From the wiki: “In May 1957, songwriter-producer Bob Crewe (‘The Sun Ain’t Gonna Shine (Anymore)‘, ‘Lady Marmalade‘, ‘Big Girls Don’t Cry’, ‘Silence is Golden‘) saw a couple embracing through a window shade as he passed-by on a train. He quickly set about turning the image into a song. Frank Slay, who owned the small Philadelphia record label XYZ with Crewe, added lyrics, and they soon had a complete song ready to record.
“The Rays’ original recording received a break when popular Philadelphia disc-jockey Hy Lit fell asleep at home listening to a stack of newly-released records on his record player. ‘Silhouettes’ happened to be the last record to play, and so it repeated until he woke up. Lit began to playing the song on his show and it became popular enough that Cameo-Parkway picked it up for national distribution. The Rays’ ‘Silhouettes’ eventually reached #3 on Billboard Hot 100, while also hitting the Top-5 on both the sales and airplay charts. It became the group’s only Top 40 hit.