Marilyn Manson- the inspiration in late 90's
There are some artists who Madonna especially liked to copy is some eras . In the begining it was Olivia Newton John, in the early 2000's it was Kylie Minogue, Confessions era was inspired by Raffaella Carra, now it's Lady Gaga. The same was with Marilyn Manson. He gave Madge's some ideas in 1998- 2000 years, mostly in 'Nothing really matters' video.