Cover songs.
I've been listening to them all too much lately, thanks to finally having a computer that has listenable sounds. Tori Amos is an ace - I like
her version of Leonard Cohen's Famous Blue Raincoat even better than the original, and she has also made amazing covers of songs like Smells
Like Teenspirit and
Like A Prayer. (I like them better than the originals too, but some might consider that a disgrace.
)
But, my favourite has to be the GB Ukulele Orchestra and their
cover of Kate Bush's Wuthering Heights. It made me laugh so hard I cried. It's priceless.