If you've got a query about moderation (mine or anyone elses) then feel free to email the person concerned, I've put my name to the closure of the threads in the form of a comment so that if people do feel the need for clarification it can be provided because you know who to contact. I'm happy to look at any queries raised, that doesn't necessarily mean I'll change my decision or be able to but at least you'll know it has been considered further.
As it is the Christina Aguilera thread could have been closed for a number of other reasons - it was effectively a link and run, there was no comment there and none looked likely to be forthcoming, it was almost an inverse "I'd hit it thread" which isn't any better than the normal way round, as a thread it didn't seem to be achieving anything other than as a PC++ exercise. I could perhaps have given a more detailed reasoning in my post when it was closed so that was remiss of me possibly.
Thanks to others for other nice comments.