" You can't really "see" stomach abs support the back, which is all they apparently do."
I don't know how serious this thread actually is......but :
The abs are a main component in singing technique. They help your breath support when the muscles contract, and you will always hear a voice teacher saying "keep your ab muscles engaged!!!" They can also help your posture from not sinking over, and collapsing the upper part of your body, cutting off half of your sound/acoustical potential/breath. Last time I checked, singing is pretty important if you want to be on Broadway (for musicals at least).
So really, don't be so hard on the abs. They're a lot more useful than, say, your appendix?
-There's the muddle in the middle. There's the puddle where the poodle did the piddle."