I actually love Lady GaGa.
I wouldn't say I'm a huge fan, but I do enjoy her music. Of course I disapprove of some of her "grotesque" lyrics, but her music is really enjoyable. Like most fans, "Poker Face"* and "Just Dance" are my favorite songs. Again, I don't totally approve of the overall theme with the lyrics (drinking and sex), but each song is great. Her vocals during the chorus of "Poker Face" are great and the entire arrangement of "Just Dance" is just fabulous. And I kind of like its message to "just dance" and you're "gonna be okay."
Her fashion is... questionable, lol, but unique nonetheless. It certainly makes her stand out and catches your hair.
Sometimes I did think of Ayu when I saw her, but I don't usually compare them
too much.
* "Poker Face" -- I'm sure you can imagine how close I was to typing it in all lower cased letters.