Songs I Can't Get Out of My Head

I'm sure everyone at one point or other has gotten a song stuck in their head. Usually it's a song you can't stand, and so you really wish it would go away, and yet whenever you're bored or driving or sitting around at work/class, you suddenly find yourself humming that stupid song! Recently, three songs have been stuck in my head:

1. Brighter Than Sunshine - Aqualung. This song has gotten a lot of airplay, and they're definitely a "buzz" band right now. I can't say that I really liked this song at all the first time I heard it, but it's all over the radio and TV right now, so it just got stuck in my head. It's kind of growing on me. I guess I'll have to go to Virgin or Tower and try out the entire album to see if I like it. This song usually starts playing in my head when I'm taking the bus to work. Something about being packed into a bus with strangers at the start of the day with the morning sun shining behind me makes me think of this song.
2. Sugar We're Going Down Swinging - Fallout Boy. Man I hate this song! You can't even tell what the hell the lyrics are half the time, and the guitar "riff" during the chorus is really really lame (listen to it sometime, a monkey could play it, there's no motion at all, it's completely static and uninspired). And yet it's on the radio all the time, and I find myself randomly singing it: "We're going down, down in a doo-dee-da-round, and sugar wull goin' down swingin'". They are like the next Green Day or something, but with a lot less talent, it makes me sick.
3. Special - Garbage. I have no idea where this song came from, but starting a few days ago I just started singing it. I was taking pictures today and that's all I kept singing. Really odd. Good song though, I actually like this one. :-)

What songs have you all been singing in your heads?