If the pressure is getting to you, whistle. In a barely audible way. It's the best way I know of to let go of tension. Music gets your mind off the situation, and the act of whistling melts the tension out of your body. ↗
Playing and singing at the same time is pretty cool, but sometimes it's difficult to know when you can just really let go a bit because you've got to get back to bloody microphone and sing some stuff. ↗
I was just talking about women, just in terms of understanding them as much as we can ever understand the opposite sex. I'm trying to let go of certain male approaches to things that you inherit, that you grow up with. ↗