Here's the tablet from the article I was talking about, it was on March 2007 it appears (lol stupid memory) and it said that ayu sold more than 45,500,000 album+single copies to that date, now she most likely reached to 47,000,000 with the singles, A BEST 2 and GUILTY so it's 3 milllions to go that she can sell over 50,000,000 XD.