If I recall Elvis's original Christmas album was at about 7-8 million units sold. If it goes to 10 million it would be his first Diamond award. Not sure how many 30#1s has sold till now in the US but last time I read it was about 4 to 5 million. In the near future for Elvis to be awarded a Diamond award it would probably be the Christmas album. I am not sure how RIAA decides on what applies to sales totals. It would seem by what you say that he should have got a lot more sales added to the Christmas total in the last 3-4 Christmas seasons because BMG has released several Christmas packages in that time. Last year I saw 3 different covers of Elvis Christmas music in Sam Goodys. All songs on each were already released songs so why do they not count? There must be some technical reason I would think.