My mom likes every JPop song I play to her, so basically she likes the newr Ayumi, Hikki, Kumiko and Namie material. I was so bummed when she said that she didn't like Mika's Kouhaku performance, but yesterday, when I played it to her for the 7th time, she kind of liked it!
As for ULTRA BLUE, when I played her Kairo, she said "I get this water feeling..." and I was like "o_____o; THE SONG'S NAME MEANS WATER ROUTE!". The same thing happened with WINGS, I played it to her and afterwards I deliberately asked, "Do you get a certain feeling?" and she answered "Yeah, it's kind of like flying."