^What is your favourite Ayu song? If you're unsure about that song, lyrically something like SEASONS or A Song for xx is nice. I would choose a ballad or mid-tempo song. Because evolution, for example, is sung REALLY fast so it is hard to pick up the lyrics even when you have them in front of you.
I was kind of embarassed everyone had like great political leaders or scientists....

Well, in the end I chose eyecandy in the form of Daisuke Takahashi. He is a japanese figure skater and I think he is the best! One good thing is I will never forget how to write 世界選手権 (sekaisenshuken) the word for World Championship. You really learn a lot of specific vocabulary when you focus on one theme/person so much. How did they manage? Well, I'm in an intermediate course and it is doable.... I have some talented classmates.
I know - there is so much to say about Ayu. I would focus on her beginning of her career and your favourite song/performance. Maybe some short part about what she's up to now. (15th year in the business) And then the highlights...like Asia Tour, Dome Concerts, single streak, record sales. You just generally say that she is considered a fashion icon and show a few magazine covers. You cannot even list all her albums. That would soon get boring. Just choose some highlights, that you think or feel are important.