By now, you know that Britney Spears and her sister Jamie Lynn have had a pretty tumultuous relationship.

the two posing at an event

Image Group La / Disney General Entertainment Content via Getty Images

Britney has said she’s upset with Jamie for her participation in the conservatorship that Britney was held captive in for years. She also recently called out Jamie for performing remixes to her songs at the 2017 Radio Disney Music Awards.

jamie singing on stage

Image Group La / Disney General Entertainment Content via Getty Images

Britney essentially has taken issue — and rightfully so — with Jamie being in cahoots/defending the conservatorship that she deemed as “abusive.”

Yeah, things have been really rocky between the once tight-knit sisters. So when Britney posted this Instagram tribute to Jamie on Friday, people were pretty shocked.

@britneyspears / @jamielynnspears / Via instagram.com

“It’s my b-day, but you’re my heart, so I’m thinking about you,” Britney wrote.

closeup of Jamie

@britneyspears / @jamielynnspears / Via instagram.com

“Congratulations on being so brave, inspiring, and showing guts and glory in your show,” she continued. “You ain’t alone. If anybody knows what that feels like, I get it.”

young britney and jamie hugging backstage

Kmazur / WireImage

“My baby sister!!! I love you!!!”

closeup of britney and jamie in a crowd

Noah Graham / NBAE via Getty Images