Lee defeated fellow Western Australian Hannah Green by eight shots and third place-getter, Victorian Su Oh, by nine; Oh having won the same title in 2012.
The victory for the then 16-year-old Lee came just a few weeks after she had won her first of two consecutive women's Australian Amateur titles.
In winning, Lee became the first golfer in 38 years to claim both the Australian Junior and Amateur titles in the same year.
Lee would go on to become the world’s number one female amateur golfer and, before turning professional in late 2014, she joined forces with Oh and Sydney’s Shelly Shin to win the Espirito Santo Championship - the world's pinnacle of team amateur golf.
Su Oh (left), Minjee Lee (middle) and Hannah Green (right) at the 2013 Australian Girls' Amateur in Perth.
Green and Oh have also come on in leaps and bounds since the 2013 Girls' with Oh now a member of the LPGA Tour and Green - who finished in a tie for 7th at this year's Women's Australian Open - chasing her LPGA dreams on the secondary US circuit, the Symetra Tour.
Highlighting just how far Lee has come since her victory four years ago, she will this week defend her LPGA Tour title at the Lotte Championship in Hawaii as she attempts to win her 4th title on the world's premier women's circuit.