I'm a Hustler/Feelin' Groovy

I'm really feeling this. 'Tis my current mood:

  I'm a hustler, baby!

Cassidy ft Jay-Z: "I'm a Hustler"
(This one is a link because it wouldn't let me embed the video.😝)

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And what is with everyone in the 60's feelin' groovy and groovin'? Not feelinG or groovinG with a "G", but feelin' and groovin' with an apostrophe? Why? Now, I'm not knocking it, I love it, actually. It's just that I noticed The Harper's Bizarre album with this theme, and I had already painted The Young Rascals' album cover for Groovin', so I stopped in my tracks when I discovered this one.

Harper's Bizarre: "59th Street Bridge Song (Feelin' Groovy)"

The Young Rascals: "Groovin'"