The 32-year-old singer took to Instagram to reveal that she has made a public donation to the non-profit organisation, which provides reproductive health services in the United States and globally, amid concerns that the new US government could cut its funding.
She wrote: "I am making a public donation to Planned Parenthood for the teenage me who made several visits to first a clinic in Santa Barbara and then Los Angeles, CA to educate myself on my sexual health, a subject I had little to no information on because of my sheltered upbringing. I had no idea how things worked down there, and had no idea how to make a plan for them.
"Planned Parenthood educated me on my body and my reproductive health, so that I could focus on my dreams and using my voice until I knew the timing was right for me to make a plan to have a family. Since then, I have been able to focus wholeheartedly on bringing messages of strength and becoming a voice for others.
Without this education, I may have had a different life path.
"That is just my experience, but I know Planned Parenthood's broader range of services can sometimes be the only medical support low-income families ever see. I know what it's like to need help. I came from a lower- to middle-class family and never grew up with the option of health insurance. I remember having 13 cavities as a teenager, and the best option my parents could come up with was to try and take me to Mexico because we couldn't afford anything in California.
"Now, more than ever, we all need to protect and create safe places for each other. I hope I can help inspire you to make a gift as well, and become a member and an ally."