The 25-year-old revealed that her sister is "fabulous" and when Britney's incredible body was mentioned, Jamie Lynn had a hilarious response!
"Look I can't even with it, you know what I mean?" Jamie Lynn joked. "She's the older one, what is she doing? She needs to let me be the young one."
Jamie Lynn even said she's been, "Shoving her brownies."
"I'm like, 'Go ahead have a few more,'" Jamie Lynn revealed.
Take a look at the E! News video above to see Jamie Lynn talk about Britney and to find out more details from the 2016 CMT Awards!