Most people do not know Pachelbel's Canon by name, but they would recognize if they heard it. Aside from being "the Freebird of Classical Music", it also serves as a basis or a number of pop songs (as was illustrated once and twice before on Metafilter). However, the folks over at AV Club may have discovered the pinnacle of the song's use: Why “Hook” by Blues Traveler is actually a pretty genius work of metafiction.
Canon in D: Korean Breakdance stylee! No apne balian styles here yo.
Pachelbel Rant (YouTube) by Rob Paravonian (official site). A few more of his videos, including a comedy bit on the Friends theme and Sugar Ray lyrics. (previous reference on MeFi here)
A few years ago, this seemingly shy kid sat in his bedroom and recorded Pachelbel's Canon in D major. Recently, he recorded a different rendition. He's more confident and learning how to become a performer. Lest you think it's simply mimic, here's Beto (no offence dude...keep on practicing), a bit better by Indrek (notice no chords...is that Bill Gates?). Want a lesson? Here's one on a sweeping technique. JerryC's "official site" and "unofficial site". So who is JerryC? Someone to keep our eye on, eh?