That's just the thing, I'm not! 
I musical, but before I had children I had never sung alone/anywhere I could be heard individually due to crippling shyness. I even refused to do the singing part of the aural tests in music exams.
And then I had dd1 - severely autistic, and gifted musically. We communicated via song for the first 5 or so years if her life. So I had to sing in public (eg while going round he supermarket etc). I hated it, but had no choice.
Then along came dd2, equally musically gifted. So ten we were 3, all singing away to each other. And since I had someone else musical who could understand me, we started on harmonies and rounds and other stuff, just to vary the days a little...
Thankfully communication is a little easier in the Panda household these days, but the singing remains (although i don't have to participate in public anymore, thank god!) and so ds has had a thorough grounding already, as the dds are very good at mercilessly hot housing him including him. So he has been taught alternative times to most nursery rhymes...
Maybe we shod just give the music groups a miss?