On this day in music history: June 20, 1987 – “Diamonds” by Herb Alpert (Featuring Janet Jackson & Lisa Keith) hits #1 on the Billboard R&B singles chart for 2 weeks, topping the Club Play chart for 2 weeks, also peaking at #5 on the Hot 100 on the same date. Written and produced by Jimmy Jam and Terry Lewis, it is the biggest R&B hit for the veteran trumpet player from Los Angeles, CA. Right on the heels of the production teams success with Janet Jackson’s “Control” album, producers Jimmy Jam and Terry Lewis are asked to produce an album for the co-founder of A&M Records. Jam & Lewis come up with the track for “Diamonds” while they are working with The Human League on their album “Crash”. Setting the track aside when they feel it isn’t right for the UK synth pop band, the producers play the track for Janet Jackson while she’s in Minneapolis working with them on the remixed video version of “Control”. Excited by what she hears, Janet records her vocals during the session, also singing background vocals with Flyte Tyme artist/vocalist Lisa Keith. Jimmy and Terry then play the track for Alpert, who immediately loves it and overdubs his horn parts onto the song. Issued as second single from Alpert’s twenty eighth studio album “Keep Your Eye On Me”, “Diamonds” is Alpert’s second single to make the Top 10 on the R&B singles chart (after “Rise” (#4 R&B) in 1979) and his only number one single on that chart.