1974 Smash Became First TV Theme Song to Hit No. 1 52 Years Ago Today

A 1974 smash hit made music history when it climbed to No. 1 on the Billboard Hot 100-and did something no song had ever done before. Fifty-two years ago today, "TSOP (The Sound of Philadelphia)" became the first television theme song to top the charts.

Recorded by MFSB with vocals by The Three Degrees, the track served as the theme for Soul Train, the groundbreaking series that spotlighted Black artists and culture. Written and produced by Kenneth Gamble and Leon Huff, the song captured the essence of what would become known as the "Philly sound."

Built around lush strings, bright horns, and a steady groove, "TSOP" is mostly instrumental, but it's punctuated by unforgettable vocal lines: "People all over the world" and "Let's get it on, it's time to get down." Those brief lyrics helped turn the track into something bigger than a theme song and it became a global invitation to the dance floor.

Interestingly, Don Cornelius, the creator and host of Soul Train, refused to allow the show's name to appear in the single's official title. That decision led to the now-iconic acronym "TSOP," short for "The Sound of Philadelphia." Ironically, the song would forever be tied to the show anyway.

The success was immediate. "TSOP" spent two weeks at No. 1 and topped multiple charts, including R&B and adult contemporary. It also sold more than a million copies and earned a gold certification from the Recording Industry Association of America. The following year, it took home a Grammy for Best R&B Instrumental Performance.

Behind the scenes, MFSB wasn't a traditional band but a collective of more than 30 studio musicians based at Sigma Sound Studios in Philadelphia. They served as the house band for Philadelphia International Records and backed major artists like The O'Jays and The Spinners. Their work helped define an entire era of soul and disco.

Decades later, "TSOP" still pulses through pop culture. It's played before home games for the Philadelphia Phillies and remains one of the most recognizable themes in television history.

More than just a hit song, "TSOP (The Sound of Philadelphia)" was a cultural moment-one that turned a TV theme into a chart-topping anthem and helped shape the sound of the 1970s.

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This story was originally published April 23, 2026 at 4:07 AM.