"These past few days I've been thinking about Britney and everything she is going through," Xtina wrote alongside an old photo of the Mickey Mouse Club alums. "It is unacceptable that any woman, or human, wanting to be in control of their own destiny might not be allowed to live life as they wish."
Hours prior, Britney's younger sister, Jamie Lynn Spears, addressed the conservatorship for the first time ever after being accused of being complicit to the alleged abuse and "abandoning" her own sister.
Seemingly taking aim at the Spears family as a whole, Aguilera wrote, "To be silenced, ignored, bullied or denied support by those 'close' to you is the most depleting, devastating and demeaning thing imaginable. The harmful mental and emotional damage this can take on a human spirit is nothing to be taken lightly."
One of the most shocking claims Britney made during her hearing last Wednesday was that her father has not allowed her to remove her IUD, which prevents her from getting pregnant.
"Every woman must have the right to her own body, her own reproductive system, her own privacy, her own space, her own healing and her own happiness," Christina argued.
"While I am not behind the closed doors of this very layered & personal yet public conversation – all I can do is share from my heart on what I've heard, read and seen in the media," she added. "The conviction and desperation of this plea for freedom leads me to believe that this person I once knew has been living without compassion or decency from those in control."
Christina went on to say, "To a woman who has worked under conditions and pressure unimaginable to most, I promise you she deserves all of the freedom possible to live her happiest life. My heart goes out to Britney. She deserves all the TRUE love and support in the world."