To make sure we're all on the same page, I'll say that the songs must have been released by ~2012 at the latest. Though exceptions are okay if you think they fit what the thread is asking for. Older hits will make for a much more interesting discussion, however.
Few songs are timeless, especially if they're huge hits when released, but these two are perfect examples from the early 1980s and 1990s that aren't dated in production or style at all:
Few songs are timeless, especially if they're huge hits when released, but these two are perfect examples from the early 1980s and 1990s that aren't dated in production or style at all: