The singer's lawyer filed the declaration in court on Wednesday.
The pop star threatens legal action against Jamie Lynn for continually speaking about Britney's life while promoting her new memoir.
Britney Spears is elevating her fight with her younger sister.
Jamie Lynn Spears continues to share her story in a new interview for Spotify's 'Call Her Daddy' podcast.
Jamie Lynn Spears shares her story in an emotional interview for Spotify’s ‘Call Her Daddy' podcast.
Justin Timberlake's song is reportedly about his and Britney's split.
The actress' book, 'Things I Should've Said,' is out now.
'Things I Should Have Said' is out now.
The 'West Side Story' star came under fire for the video she shared online which has since been deleted.
The sisters are in the midst of a war of words following Jamie Lynn's interview with ABC News.
'Things I Should Have Said' is due out Jan. 18.
Britney Spears slams her sister, Jamie Lynn Spears, on Twitter on Thursday, following Jamie Lynn’s emotional interview.
Jamie Lynn released a statement after Britney tweeted about one of her interviews.
The 'Toxic' singer is hitting back at remarks and accusations leveled by her younger sister.