YouTube - Flight of the Conchords Ep 3 Hiphopopotamus vs. Rhymenoceros

I love Flight of the Conchords!

For those of you that don't know, they're an awesome two man band from New Zealand who make really witty, but stupidly funny, songs. They have their own TV series about them trying to make it in music in which all their songs are incorporated into the story as well. It's just brilliant, go watch the first episode and you'll know what I mean

So who else loves these guys? What's your favourite song?