I like 'Pure Pop', too. I also do Chart Statistics for UK Chart Books.
ABBA are the biggest Male/Female Pop Group in UK Chart History.
(The way some Steps Fans are going on, anyone would think that it was Steps!).
Steps have done well to go in at No.1, just under 10 Years, since their 'Gold' Album was at No.1.
But, they mean little next to ABBA.
Steps - it is their 3rd UK No.1 Album, & 8th Week at No.1. ABBA - 9 No.1 Albums, & 57 No.1 Weeks.
It is Steps 52nd Top 10 Week, & 25th Top 5 Week in the Album Chart. ABBA - 224 Top 10 Weeks, & 149 Top 5 Weeks.
Oh - They've had 2 No.1 Singles - 2 Weeks at No.1. ABBA - 9 No.1 Singles, & 31 Weeks at No.1.
And ABBA were Globally big - Steps never were. They were briefly big in Australia & New Zealand, but, not for very long.
In Continental Europe, only Belgium gave them more than 1 Top 5 Hit. (They had 1 Top 5 Hit in Sweden).
They were really only consistently big in the UK & Ireland - with their Irish success being at quite a lower level than their UK success.
Look at their Global Chart Stats here - as you can see, they were only ever truly huge in the UK:,
http://en.wikipedia.org/wiki/Steps_discography
Here is Evanescence's Global Chart Stats. As you can see, at no time did Steps have an Album as big as the first 2 by Evanescence,
or a Single as big as the first one by Evanescence.....
http://en.wikipedia.org/wiki/Evanescence_discography
I'm not a Fan of either Act - I merely show Chart Statistics.....