UPDATE: Law enforcement sources tell TMZ that the fight with the bottle was the night before Jamie Lynn's incident and neither she nor her friend were involved. The knife incident occurred after Jamie Lynn's friend was knocked over during a fight that a group of guys were engaged in.
Jamie Lynn Spears is pretty much one of the sweetest people ever, but that doesn't mean she's a pushover.
According to TMZ, the 23-year-old country singer was in a sandwich shop with a friend last weekend when someone started a fight with her pal. Sources tell the site that someone attacked Jamie Lynn's friend and that's when she sprung into action.
Apparently, after the friend was hit with a bottle, Jamie Lynn dragged her to safety behind the sandwich counter and grabbed a long serrated knife and started waving it around to break up the fight. It worked.
Britney Spears' little sis hasn't said anything about the incident on any of her social media accounts. She has been posting, but it seems to be business as usual as far as that is concerned. She's just been sharing cute holiday stuff, including some sweet pics and videos of her adorable daughter Maddie.