Blondie - Rapture

[marble falls]

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[Buttoneer]

1. Love Blondie!!!

[Buttoneer]

2. Clem Burke is amazing in "Dreaming" Just watch him in the vid

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[amerikat]

3. I've heard this discussed as the first rap song.

could be.

[Upthevibe]

4. amerikat...........

I also have considered it as one of the first rap songs. What a great tune!

This one also has a touch of a rap type feel:

[Pluvious]

6. I did some research...

Depending on how you define "popular", the first rap song could be either "Rapper's Delight" or "King Tim III (Personality Jock)". Both songs were influential and groundbreaking in the history of hip hop music.

Both released in '79

A year after the Sugarhill Gang released “Rapper's Delight” in 1979, Blondie recorded “Rapture,” the first major hip-hop hit to use original music rather than sampling other artists' beats. Released on Blondie's “Autoamerican” album in late 1980, the single, co-written by Debbie Harry and Chris Stein, reached No.

So, in a way, Rapture was the first - original - rap song

If you've never heard it before, Mark Vidler's mashup called "Rapture Riders" is pretty cool:

Info: https://www.theguardian.com/music/2005/nov/20/3