While I'm thrilled Alanis Morissette has finally learned the meaning of ironic, that My Humps cover still can't hold a candle to Nina Gordon's Straight Outta Compton. Too bad she never made a video for it, but settle for this.
Related. An even worse fan video for The Gourd's country version of Gin and Juice. Not in the same category, since I don't really think it's meant ironically. It's pretty great, though.
Update. One thing worth noting about the Gordon and Gourd covers, and the Ben Folds one mentioned in the comments, is that they're songs you might actually listen to and enjoy entirely on their own terms. The same goes for Richard Thompson's Oops I Did It Again, Fountains of Wayne or Travis doing Baby One More Time, the entire ouvre of Me First and the Gimme Gimmes and [add your favorites here]. That's because the original songs are all genuinely good. By switching up genre, the cover artists reveal the quality songwriting that often gets hidden behind the production trappings, for better or worse (depending on whether you're a fan of the original genre).
On the other hand, no one will ever listen to Alanis doing My Humps more than once or twice. Because once you get past the humor of Alanis goofing on Fergie, what you're stuck with is a lousy song.
