VH-1 has a radio station called "Pop for Sale." It features only pop songs that have been featured in commercials.
I figure if the artist wants to license their music to hawk soap, it lets me know that they must feel strongly about the soap. And money. Not that there is anything wrong with that.
I must say, though, that hearing "Feels like the First Time" by Foreigner used in a household cleaning product commercial did leave me feeling odd. Even though they finally went to an all wussy ballad format, Foreigner still represented the hard rock of my high school days. I guess it just makes Moms in their late thirties feel more comfortable about being a housefrau to have familiar music to guide their decisions.
More info is available in this piece from CityBeat.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.