The Voice coach, who has been in the music industry for 26 years, said she respected "unapologetic" women like the two singers, and said that Miley had been made a "scape goat".
"I admire people like Miley, like Rihanna, girls that are just… they are quite unapologetic about what they're doing," Kylie, 45, told Sky News.
Kylie has been in the music industry for 26 years
"Is it too much? It depends on what your personal taste is. But she's definitely a scapegoat for what might be happening in the broader sense of pop music.
"Let's not forget, there's always been sex, drugs and rock and roll," she added. "But the guys seem to get away with it."
Kylie says she admires "unapologetic" singers such as Miley Cyrus and Rihanna
Kylie, who split from her Spanish boyfriend of five years Andres Velencoso in October, also said that life as a pop star can be a lonely one.
"I definitely have moments where I'm quite morose," admitted the songstress, whose 12th studio album, Kiss Me Once, is set for release 18 March. "Everyone has to do it, you have to go down sometimes.
Kylie posing with her latest album Kiss Me Once
"I can feel quite lonely… My job and my lifestyle is not something that everyone can relate to."