Like Sunshine said, even if her old stuff is contributing to this spike, it's not a bad thing. It shows people still have an interest in her after all these years. And as someone pointed out, that 1,300+ Ayu material didn't just appear over night. Many of her songs have been available for years. It's impressive that people with less can hold their own against her, but it's even more impressive (to me at least) that she can hold her own after all these years. Old songs or not, people are still interested enough to buy them. And that's just digital sales. And in Aoyama Thelma's case, she had one (or more?) super big hit and now where is she?
All in all, GOOD JOB AYU!
