The Housemartins, "Flag Day"
I don't want to profane this with my witless scribbling.
Panopticon, "Trauerweide II"
From a split release with Panopticon and Waldgeflüster, where the bands each contributed a long black metal song and a folk cover of a song from the other band. This is Panopticon's cover, and I'm not familiar with the original, so I can't really comment on how it differs. But it's a nice listen, anyway.
System of a Down, "Toxicity"
I'm not a nu-metal guy, at all. I've picked up an album or two here and there, usually when the din of positive reviews got sufficient for me to decide to give a record a whirl. I try and give pretty much every genre an honest chance by picking up well-regarded releases and really giving them a listen. And so, Toxicity, which reviewed very well back in the day. I'm not wild about it!
The Black Keys, "Next Girl"
You know, it's been a really long time since I've listened to this record. Instead, I have listened to The Brothers of Chico Dusty, the mash-up of this album with Big Boi's Sir Lucious Left Foot: The Son of Chico Dusty a lot. I think that should count.
Prince Paul, "Open Your Mouth (Hypothalamus)"
That "I Can Sing A Rainbow" loop always gets me whenever it pops up. Prince Paul is just the master of finding these sorts of great bits in off-the-beaten-path records. I don't know if this is the first place anybody used it - WhoSampled seems to think it is, but I know of at least one song that isn't there (Edan's "I See Colors" where he acknowledges that "Prince Paul already used this loop"). So who knows for sure? But probably.