Perhaps the worst one is a radio ad for something called Cars (Kars?) for Kids. It's worse than Achy Breaky Heart; a ghastly jingle that gets stuck in my head unless I instantly change the station. Hell, just thinking about it has gotten it stuck in my head now. I'll need to crank up some AC/DC to get rid of it as soon as I'm done with this post. As a public service I won't include a link to it.
****. There is no level of hell hot enough for whoever is responsible for that.