she's absolutely singing live there. No question at all about that. Look at the entire vid. She changes the voice melody in many instances and in some cases it is to make it easier for her to sing live. Why would you do a track like that and then lipsync to it?
Damn! The top pic in that gallery would be a top-notch spread-pussy porn shot if she was only naked. She's obviously got the moves...if she would just show the skin!!!