I didn't know that she had red hair like this.
It does look reddish in that section of the video, doesn't it? I'm sure that it's because of the stage lighting. She's wearing that purple top in the screencap, so I think that places the clip as being from one of the very first tours, back in, what, 2005 or 2006.
But I'd never want her to
actually go red. She looks so pretty blonde.