Look Yachi,

A lot of singers go into the studio and re-record their songs with a single take so that they can lip synch to it and that is what makes it appear that they are singing live. They add more ad libs and different notes on purpose, get it? If they want to be able to dance hard without sounding winded or jumpy, then that is what they do....lip synch. I am not hating on Kelly at all. Hell, I think that Beyonce lip synched some of Run the World on the billboard awards. How in the hell did she shake her head that hard and stay on key? Everybody does it some time or another.