One of the joys of being middle aged is that I can enjoy both of these songs. If you don't get the beauty of Paul Anka's treatment of Kurt Cobain's anthem to troubled youth, you're too young. If you don't get the angst of Cobain's performance, you're too old. If the juxtaposition of these performances doesn't make you laugh, you're not awake.
Here it is - proof that music, like language, is infinitely malleable.