^ I Will in her So Crazy tour is really good.
http://www.youtube.com/watch?v=uiwl5rZoiDA around 4 mins into the video.
Queen of Hip-pop in her 2005 tour is really good too.
http://www.youtube.com/watch?v=4ifCgovCJNc
Her Live style 2006's vocals onwards decline maybe except for some performances on her Play tour like Come.... I cant think of really good vocally ones.haha