Three things:

Computer Whine (I feel your pain Pitc9)

My coworkers yapping (It is honestly really funny, I should record it someday to a CD and sell it)

and inside my head: Cradle of Filth: Nymphiphetamine (sp?) off of the Resident Evil 2 soundtrack

And now that ive read this thread, I have Whiskey Luliby stuck in my head too (my brain works in stereo). Thanks Debbie, now Im gonna cry! (J/k lol). That song is kind of depressing though, probibly because a friend of mine had two friends commit suicide like that