No, really, when did this start happening? I just happened to catch Eminem's performance on the MTV Movie Awards last night and it was quite obvious he was lip-syncing. Since when does a rapper need to do that? I had seen him "perform" on SNL before and suspected he wasn't rapping when his voice sounded exactly like the song on his record. But, if you watch the clip you can tell he isn't even rapping live. Why?