First of all, take the Queen out of this thread, because she has nothing to do with this disccussion. Actually, 1.8+ million is a good number in the UK, but come on. Don't you all consider Rihanna the biggest star in the UK? She should have at least 2.5 million selling album at this point.
You know the problem??? that while some artists sell 1.45M + 0.47M albums in 5 years time (= 1.92M)
Rihanna has sold 1.86M + 0.7M + 1.87M + 0.99M + 0.47M = 5.89M