A-fucking-men. I love pretty much everything Chili Peppers. That’s one of my favorites. Others would be “Suck My Kiss”, “Catholic School Girls Rule”, “Fight Like a Brave”.
I’d also like to add their “Show Me Your Soul” and “Around the World”.
I also like Stevie Wonder’s “Superstition” and DeLite’s “Groove is in the Heart”.
a new day and a new vote
‘Funky’ by the Chambers Brothers will bring down the house.
I am no musician or musical scholar/theorist, but there’s a rhythmic difference between an “emphasis on the one” song à la Stephen Foster’s Camptown Races, and a heavy (and syncopated) emphasis on the one.
Does that mean one could “funkify” a song like Camptown Races? Hmm. Thought experiment time…
Or maybe I’m overthinking this.
You can funkify damn near anything. I have a Lyn Collin’s version of “Fly Me To The Moon” that’s incredibly funky.
Citey-Linkey? 
Hurray! Aint nothing wrong with that 
More Robert Randolph Live at the Wetlands- get it.
I think the Heads’ funkiest songs are Girlfriend is Better and Born Under Punches (The Heat Goes On), but neither has a real music video that I know of. Although everybody should see Stop Making Sense at least once.
Superstition is untoppable as far as I’m concerned, but there are a bunch of other great picks in this thread.
aquaboogie…Make my funk the P Funk.
I obviously do not understand what funk is, so I’ll just shoot in the dark and link Strike it Up, which is house music (which the song tells me it is, I’ll take its word for it), which may or may not be funk or related to funk. I have no idea.