I tend to listen to a bit of everything, but I'll admit here three songs that just STUCK in my head for the longest time. I dunno why, but there's something catchy in these tunes....
Gee, by Girls Generation.
Tell Me, by Wonder Girls.
Ring a Ding Dong, by Kaera Kimura.
.... the fact that two of those songs are by Girl groups... with the word Girl IN their names.... makes me feel a little emasculated. Especially considering that in "Gee", they're singing about their feelings for a guy.
Oh, and this; http://www.youtube.com/watch?v=VTjurWc4q3g&videos=SpqnDLkkHHo