Me neither, but I think she might have been one of the people up the back dancing behind the baking paper type stuff. There were sillouettes of what looked to me like ladies dancing on poles, so I suppose she'd be one of them. The actual dance routine looked quite tricky, so I'd guess they were professional dancers.
Davina mentioned it thismorning on Capital Radio, but I got the impression she only heard about it, but didn't notice herself either.