Here is a theory of "time travel," as put forward by Albert Einstein.
Here is a competing theory of time travel, as put forward by Britney Spears (with citations to C. Lloyd, R. Zemeckis, M.J. Fox).
From the video evidence presented here, I think it’s fairly clear Britney has done some time-traveling, probably just before recording began. Side effects appear to include malaise, confusion, and gas.
Additional side effects include general blogger anomie, brought on by posting this.