Britney Spears criticises little sister Jamie Lynn Spears for suggesting she was 'out of control'

Britney Spears let it all out when criticizing her sister, Jamie Lynn Spears, for suggesting she was "out of control" while performing her songs and remixes. When it comes to her true thoughts on baby sister Jamie Lynn Spears, the iconic pop star didn't shy away from calling her out in public.

The Zoey 101 star appeared on Good Morning America on Jan. 12 and discussed her involvement in Britney's conservatorship, which ended last November.

"I didn't understand what was happening, nor was I focused on that. I was focused on the fact that I was a 17-year-old about to have a baby. I understand just as little about it then as I do now," she said on air, while promoting her upcoming book, Things I Should Have Said.

But Britney doesn't seem to agree with some of the points her sister made during the interview. The pop star took to Twitter on Thursday, Jan. 13, to share her side about how the situation unfolded over the last 13 years.

"I watched it with a 104 [degree] fever lol and it was actually kind of nice having a fever so high cause I had to surrender to not caring," she said in a statement. "I just couldn't give a f--k but my head hurt so bad … of course I'm a drama queen if I get sick so I think I was dying." 

The singer, who said she's feeling "fine" now, went on to say there were two things "that did bother me" about Jamie Lynn's sit-down. 

"My sister said was how my behavior was out of control," Britney said. "She was never around me much 15 years ago at that time …. So why are they even talking about that unless she wants to sell a book at my expense ??? REALLY ???"