A video showing Britney Spears’ 23-year-old sister pulling out a knife to help defend her friend after they got involved in an altercation.
The footage was uploaded online by website TMZ earlier today.
The mum-of-one reportedly ran to the counter to fetch a "long serrated bread knife" before being questioned by a worker at the restaurant in Hammond, Louisiana.
Police were allegedly called by nobody was arrested following the incident. Jamie’s friend reportedly did not want to press charges after the fight.
The star’s rep has yet to comment on the altercation.
Jamie Lynn got married last year to husband Jamie Watson, and has been attempting to forge a career in country music.
We're just glad nobody got hurt!
NOTE: Never wave a knife around like Jamie Lynn Spears. It is bad. You will get in trouble