The 29-year-old singer has been very open in recent years about her battles with eating disorders, depression and body image, including her time in rehab to address these demons. After so many struggles, including an on-going legal dispute with music producer Dr. Luke, it's no surprise that she feels empowered to take down the haters who've felt the need to comment on her appearance.
On Friday, Kesha called out a specific troll before launching into a lengthy message about self-worth.
"Dear @jackknife76. I see that you would very much like me to know that you think I'm ugly, and also a 'whore,'" she wrote. "Well, I understand that that is your opinion, but I disagree. I'm not perfect but I'm pretty f**king magical. and also, I am not, in fact, a whore."
See images of Kesha:
Kesha slams trolling body shamers: 'Kiss my magical imperfect a**'
Photo by: Raoul Gatchalian/STAR MAX/IPx
KeSha at Rehab at The Hard Rock.
(Las Vegas, Nevada)
Kesha performs at the 2015 Delete Blood Cancer Gala at Cipriani Wall Street on Thursday, April 16, 2015, in New York. (Photo by Charles Sykes/Invision/AP)
Kesha and boyfriend Brad Ashenfelter are seen flying out of LAX airport, 15 April 2015.
15 April 2015.
Kesha performs on stage during Brian Fest: A Night To Celebrate The Music Of Brian Wilson at the Fonda Theatre on Monday, March 30, 2015, in Los Angeles. (Photo by Paul A. Hebert/Invision/AP)
Kesha attends the DKNY Fall 2015 show during Mercedes-Benz Fashion Week Fall 2015 at The Theater at 547 W. 26th Street on Sunday, Feb. 15, 2015, in New York. (Andy Kropa/Invision/AP)
Kesha arrives at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Ke$ha poses in the press room at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Eric Jamison/Invision/AP)
FILE - This Nov. 24, 2013 file photo shows musician Ke$ha at the American Music Awards at the Nokia Theatre L.A. Live in Los Angeles. Ke$ha's representative confirmed Friday, March 7, 2014, that the singer checked out of rehab. She entered in January. The 26-year-old vegetarian said she entered rehab to "learn to love myself again, exactly as I am." Ke$ha, whose real name is Kesha Rose Sebert, is the performer of such tunes as "Crazy Love," ''Die Young" and "Timber" with Pitbull. (Photo by Jordan Strauss/Invision/AP, File)
Ke$ha, left, and Pitbull perform on stage at the American Music Awards at the Nokia Theatre L.A. Live on Sunday, Nov. 24, 2013, in Los Angeles. (Photo by John Shearer/Invision/AP)
Ke$ha performs at IHeartRadio Music Festival, day 2, Saturday, Sept. 21, 2013 in Las Vegas, NV. (Photo by Al Powers/Powers Imagery/Invision /AP)
Ke$ha performs at the iHeartRadio Ultimate Pool Party at the Fontainebleau Hotel on Saturday, June 29, 2013 in Miami. (Photo by Jeff Daly/Invision/AP)
Ke$ha arrives at the iHeartRadio Ultimate Pool Party at the Fontainebleau Hotel on Saturday, June 29, 2013 in Miami. (Photo by Jeff Daly/Invision/AP)
Pop music singer songwriter Ke$ha performs on her Warrior Tour at the Golden Nugget Casino on Saturday, May 25, 2013, in Atlantic City, N.J. (Photo by Owen Sweeney/Invision/AP)
Ke$ha arrives at the 26th annual Nickelodeon's Kids' Choice Awards on Saturday, March 23, 2013, in Los Angeles. (Photo by Todd Williamson/Invision/AP)
Ke$ha arrives at the 2013 Presidential Inaugural Charity Benefit, on Monday, Jan. 21, 2013 in Washington. (Photo by Stephen Boitano/Invision/AP)
Ke$ha performs during the second night of KIIS FM's Jingle Ball at Nokia Theatre LA Live on Monday, Dec. 3, 2012, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)
Kesha arrives at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Singer-songwriter Ke$ha poses for a portrait, Tuesday, Nov. 13, 2012, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)
U.S. pop singer Ke$ha performs during the Rock in Rio music festival in Rio de Janeiro, Brazil, Thursday Sept. 29, 2011. (AP Photo/Silvia Izquierdo)
U.S. singer Ke$ha performs at the Wireless Festival in Hyde Park, London, Saturday, July 2, 2011. (AP Photo/Jonathan Short)
Singer Ke$ha arrives at KIIS FM's Wango Tango in Los Angeles on Saturday, May 14, 2011. (AP Photo/Dan Steinberg)
Ke$ha arrives at the MTV Video Music Awards on Sunday, Sept. 12, 2010 in Los Angeles. (AP Photo/Chris Pizzello)
Ke$ha appears on the NBC "Today" television program in New York Friday, Aug. 13, 2010. (AP Photo/Richard Drew)
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"Also bullying someone who has struggled publicly with body issues is pretty mean," she continued. "Thank god I'm in a place in my life where I feel empowered to address your nasty comments instead of letting them destroy me."
The "True Colors" singer concluded by letting the world know that she doesn't need anyone else's unsolicited opinion about her booty -- and what haters can do to it. "On behalf of anyone anywhere who struggles with body image, STOP IT.my body is not your business," she said. "In conclusion, kiss my magical imperfect ass!"
Appropriately, this note was posted alongside a photo of Kesha bending over in the middle of picture-perfect blue waters, showing off said butt in a light blue swimsuit.
This isn't the first time Kesha has opened up on Instagram. Last month, she also shared a defiant photo with her back to the camera and middle fingers up in the air while rocking a bikini, which included the sentiment, "a big ol' f**k u if u wanna hate on my body.'
"I have been battling depression and an eating disorder for a while now," she wrote. "My career is in a strange place and it feels like I'm fighting an uphill fight some days. But I have decided to take my life back. My freedom. My happiness. My voice. My worth. I will not just f**king be quiet and hide. Today I will say f**k it and live."
In an interview with Vogue last year, the Nashville native explained that she "went to a dark place" before seeking help. "There was a lot of not eating -- and I started to think being hungry to the point of feeling almost faint was a positive thing," she told the magazine. "The worse it got, the more positive feedback I was getting."
Once she left rehab, Kesha focused on treating herself right, both physically and mentally. "I realized being healthy is the most important thing I can do for myself," she said. "Now, I'm trying to embrace the skin I'm in. It's difficult sometimes. Every day I have to look in the mirror and make the choice to be kind to myself. This is who I am -- I have to love that."
Telling off body shamers with bikini photos posted to Instagram seems to be Kesha's new go-to, as she also did the same thing in March. Find out more about that tell-off Instagram post in the video below.