The 23-year-old "Wrecking Ball" hitmaker said she "learned a valuable lesson in this meaningless process."
"Bleached my natural healthy hair rebelling out of boredom while dealing with a consecutive amount of time off on the Woody project ( 2 months ago). Something inside told me I'd regret it," Cyrus wrote on Instagram.
"...Not to mention I felt like a self obsessed psycho while real issues are out there in the world needing to be dealt with I was sitting in front of a mirror going thru strand by strand like my hair and what it looks like actually f**king matters!," she continued.
"So please fellow humans next time you feel that tickle in your belly while making a decision listen to what it says and know the true you can never be replicated or replaced you are the one and only you," the Grammy-nominated singer concluded.