When you are singing, always remember who your audience is, and who *thinks* they are your audience. Your audience *is* a 1" piece of gold-spluttered mylar. The people *think* they are your audience. Regarding that mylar, know how far away you need to be from it, don't change the distance unless you mean to, and don't be too far off axis. If you are flirting with the proximity field, know where its edges are. As you move close to the mic, the bass goes up. Unless you are a beat boxer, don't swallow the mic, unless that's what you have to do to avoid feedback. Don't ignore the mic. It's an instrument that you play, not a point and shoot camera.
Regarding the human audience, *never* let them know that the mic is your audience. Let them think that *they* are. Look them in the eye, smile, and don't stay on one person too long. You can look a little longer at hot babes, and if you are moving, you can come up to them face to face a little. If the audience is into it, touch some hands. You can only give the audience what they give you. If they are dead fish, there isn't enough alcohol and weed in the house, or you suck today. Shit happens.
. When it comes to people like that, they're celebrities in their own right. They create a buzz. 
