Recently, Ayu was featured on a MUSIC STATION ranking of male and female artists who appeared on M-Ste the most times and placed 2nd (she'll be 1st in a few singles' time) to an older singer from the 80s/90s.
Near the end, they basically play a bunch of clips and you can somewhat see a change in the way her makeup is done as the years fly by in a few seconds. As far as I can tell, she's just gotten more glamorous as the years have gone by, haha.