Music to Watch Girls By

Crewe first heard the song performed in a jingle demo for a Diet Pepsi commercial, and according to Greg Adams, writing for All Music Guide, the song "exemplified the groovy state of instrumental music at that time.

"[1] In Bob Crewe's version, a trumpet plays the whole verse, the first time around, sounding like Herb Alpert's Tijuana brass style.

The "big-band, horn driven"[2] recording peaked at #15 on the Billboard Hot 100 the week of February 11, 1967 and #2 on the Easy Listening chart.

[3][4] A vocal recording from 1967 by Andy Williams, featuring lyrics written by Tony Velona, peaked at #34 on the Billboard Hot 100 the weeks of April 29 and May 6, 1967.

[8][9] This version was later used in a Fiat advertisement in the UK in 1999, with the re-released single reaching the top ten in that country.