Lies in extras!

Rating: 8/10 (20 December 2008)

I saw Meryl Streep interviewed where she said that she hadn't heard ABBA songs before being asked to do the film.
BUT in the Blu-ray extras, the writer (I think it was the writer anyway) says that Meryl Streep wrote a fan letter to her after seeing the stage show.
Can anyone confirm this, and if so which interview was it?
I am going to have to waffle now due to the daft 10 lines of text rule... I've made my point but I should talk random crap for a little bit. What a stupid thing to be forced to write 10 lines... blah blah blah. How dumb.