Source:
http://www.dkkaraoke.co.jp/newsrelea...B3%87%E6%96%99
ayu has no song on the top 50 but she is overall the 3rd most requested artist of 2011 in karaoke, she was also #3 on 2010!
That's pretty good because she has been relevant in japanese culture (karaoke is the culture!) for so many years.
Even though she doesn't have single really popular song recently, but she probably would cope most of the 50-100 places or something with a lot of songs. haha