Because every style of dance that will be covered has been done by at least few couples. Now it's just a matter of everyone doing what they haven't already done. And then there's the first two weeks when it was all muddled up into boys v girls, so that all needs to be done as well.

I seem to remember that Aled got a lot of votes from older people (women mostly?) because of the kind of programms he made for television.

I think it's very clever of Lilia and Erin to appeal to the older public by choosing music they can relate to. It's bound to get in extra votes. Chances are that younger people will go for Emma or Louise anyway.