Man, I find that really awful songs I heard at a club or something get stuck in my head until I can't stand it anymore--I have to play it on Playlist or something to get over it; music I would never seek out and listen to nor would have any interest in naturally as I don't find it "musically rewarding." But it's catchy, fun, and sticks in my head; lately it's been all the Lady Gaga stuff and some dude named Kid Cudi (?) "Day n' Nite."