Say It Ain't So - album - was created in 1975.
Yes, he did according to wikipedia.org, but it does not list what album.
So Cool - Sistar album - was created in 2010.
So Far Away - album - was created on 1980-05-15.
I Told You So - Count Basie album - was created on 14-01-12.
Every album Metallica has made went platinum, so i would say about 15
So They Say - album - was created in 2001.
Yes, he did according to wikipedia.org, but it does not list what album.
So - album - was created in 1919-05.
You Are So Beautiful - album - was created in 1977.
So Real - album - was created in 1999.
So Natural - album - was created in 1993.
So Easy - album - was created in 2007.
So Fine - album - was created in 1975-08.
There is no precise answer that can be found for this question. It only mentions who said it and in which year but not an exact date. One album used this phrase for a song title in 1975 though.
So Cool - Sistar album - was created in 2010.
So What - Joe Walsh album - was created in 1975.
So What - Le Shok album - was created in 1998.