I'm a guitarist who is learning drums with the goal of being good at both. Most of my favorite guitarists are able to sing while they play complicated things. I'm wondering if it is easy to sing and drum at the same time (once you're a good drummer that is). Since drumming involves doing 4 different things with each limb you have already taught your brain how to do different things at the same time. I'm assuming this might transfer over to singing as well? At any rate I'm sure it will make singing and playing guitar at the same time easier.