This week's SONG STUCK IN MY HEAD..."Erase/Rewind" by the Cardigans.
Genre: According to Wikipedia, alternative rock/indie pop, though it's a lot lighter/soft than that. ("It's true, I saw it on the Wikipedia" - quote from Jennifer's Body)
Why It's Stuck on My Head: After going through the hard drive from my old (and now long-gone) laptop I had as a tween, I rediscovered this (and about a hundred embarrassing photos of emo boys and various My Chemical Romance and Panic! At the Disco fanfiction). Actually the way I originally discovered was thanks to a (poorly made) fan video on Youtube for MyChem. Oh, the Fangirl as a Preteen.
Why. It. ROCKS: Well, it more rolls than rocks, persay, but that's not the point. This song is the pure definition of smooth. Very prickly guitar notes, very angelic voice, and drums and bass that sound like they came straight off a little kid's first keyboard. Somehow it all fits and becomes this ridiculously catchy tune that makes you want to dance Luna-Lovegood style.
Fun Fact: The Cardigans had a song, "Lovefool", on the soundtrack for William Shakespeare's Romeo+Juliet. Because that's the kind of music they listened to in that time. Obviously.