Britney Spears has referred to her sister Jamie Lynn Spears as a "selfish little brat" and said she was "f***ing hateful" when she was younger in a rant on social media.
The criticism from the pop singer, 40, comes whilst her younger sister, 30, is promoting a new tell-all book, Things I Should Have Said - which was released earlier this week.
The memoir by Jamie Lynn - known for Nickelodeon shows All That and Zoey 101 - is understood to discuss life within their family, which she's further talked about in interviews.
