There are lots of people on YouTube, great people, who can sing “I Heard It Through the Grapevine”. (Besides the incomparable Gladys Knight and the Pips). Go listen to them. Then come back, and hear Marvin Gaye sing it a capella. It’s astounding. Watch as he leaves huge gaps in the song for the instrumentals: you can hear the band in the silence. I love when Gladys Knight sings this song, but I think Marvin does it best.
If someone said that if I wore that frilly shirt I could sing this good, I would wear that shirt everyday.