The 30-year-old former Nickelodeon star took to social media on Monday to shoot down reports she doesn't have Britney's back.
Jamie insisted she "loves" and "supports" her famous sister, but she also made some questionable remarks like she doesn't care if Britney moves to the rainforest to have "a zillion babies."
Beginning the video, Jamie Lynn said she's remained quiet on Britney's 13-year conservatorship because she didn't feel it was her place to address it. “But now that she’s very clearly spoken and said what she needed to say, I feel like I can follow her lead and say what I need to say," she told her fans.
Insisting "it's extremely clear" that she has "loved," "adored," and "supported my sister," Jamie Lynn appeared to get upset and stated, "This is my freakin' big sister before any of this bulls---."
That's when she seemingly turned the tables, insisting she'd continue to support Britney regardless of what she does with her life.
“I don't care if she wants to run away to the rainforest and have a zillion babies in the middle of nowhere, or if she wants to come back and dominate the world the way she has so many times before," Jamie Lynn continued. "I have nothing to gain or lose either way."
She added, "This situation does not affect me either way because I am only her sister who is only concerned about her happiness."
Getting emotional, Jamie Lynn said she's made a conscious decision to be in Britney's life as her sister and an aunt to the singer's sons.
"I've supported my sister long before there was a hashtag and I'll support her long after," she stated. "My sister knows I love and support her. That's the only person I owe anything to."
Adding that she's "so proud of her for using her voice," Jamie Lynn insisted that she's speaking on behalf of herself and not her family.
As Radar reported, Britney's fans attacked the singer's little sister after they noticed she remained quiet following Wednesday's hearing.
Britney appeared before the judge in her conservatorship virtually and made it clear she no longer wants to be in her conservatorship or under her dad Jamie Spears' thumb.
She threw out several accusations, comparing her conservatorship to "sex trafficking" and insisted her dad "should be in jail" for how he's treated her.
Britney also revealed she wants to be married and have a baby, but Jamie Spears won't let her take out her IUD.