From the "Who asked You?" Department, it's my opinion of Shonen Knife.
Okay, here's one thing I can add to the discussion about Shonen Knife. Sometimes, a tune sticks in your head. Sometimes, it's an irritating tune and you want it to go away. In these situations, I think of Shonen Knife's "I Like Choco Bars". It's sufficiently catchy to dislodge any other song. Despite its catchiness, I have trained myself to purge "I Like Choco Bars" from my head.