I've been in a funk for the last couple of days, which is why I missed yesterday (among other things).
Since I'm in a funk, here's a good song from an artist who specializes in that "wait, what?" kind of music I like so much; music that sounds like it should mean one thing but actually means something much darker and much stranger when you pay attention to the lyrics. That artist is Jonathan Coulton, and he's basically made a career off of writing those sorts of songs. For a while, it was just him and his guitar, but then he started to get moderately popular and started stretching his artistic legs, and ended up with a great album produced by They Might Be Giants, which was great in all sorts of ways.
You should check him out if you want some weird and messed up music with really catchy tunes stuck in your head.
Obligatory Youtube Link: http://youtu.be/9LR_5yk7bgc