Throwing back to the week of April 20, 1974, the #1 song on the Billboard Hot 100 was ‘TSOP (The Sound of Philadelphia),’ a disco instrumental by soul band MFSB, a Philly-based group comprised of more than 30 musicians. Vocal group The Three Degrees show up to deliver the song’s only words, the repeated phrase “Let’s get it on, it’s time to get down.”

This track was written as the theme song for Soul Train, and became the first TV theme to ever reach #1. Four more repeated the feat, and rather than give those away here I’ve made a note to do a week on them after I finish with Cowboy Carter.

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