Isley Brothers: Behind a Painted Smile

This Motown classic reached number 5 in the UK singles chart in 1969, though the recording dates from 1967. It was meant to be my Sunday music video, but because I scheduled it wrongly it will have to my Monday music video.
A site about the Isley Brothers has a couple of excellent trivial facts:

• They employed Elton John as a keyboardist during their 1964 UK tour;
• Their 1966 single "Testify" features the first recorded appearance of guitarist Jimmy James, later known as Jimi Hendrix.