25 is an era of its own. Usually, it's the first week that basically shows that the album is riding off the success of the previous album.
Even if it fell off the face of the earth on it's second week, it'd still be an era of it's own on the strenght of the smash hit 'Hello' and the huge sold-out tour it'll have next year!
So, she'll be the first female artists to have two diamond albums since Britney , this is the biggest era WW since Thriller, and honestly it might even be bigger. Probably is.