Vardy now has 9 goals and is the top scorer in the Premier League after netting a hat-trick in Leicester's record win.
Brendan Rodgers' side climbed to second in the Premier League after the stunning result, while Southampton dropped into the bottom three as a result of their worst-ever defeat.
Jamie Vardy has now scored 19 Premier League goals for Leicester City in the 2019 calendar year. Only Sergio Aguero (20) has scored more.
EPL top scorers 2019-20 season
Statistics correct as of October 25, 2019.