Justine began on the World Cup circuit in December 2010. In her second World Cup start she won dual moguls bronze. She won her first World Cup first place in January 2013.
- 2014 : Gold medal at the Sochi Olympic Games in moguls.
- 2013 : Bronze medal at the World Championships.
- 2012-2013: second place in overall standing at World Cup.
- 16 Podiums at World Cup.
|1||Olympic Games - Sotchi||08/02/2014|
|2||FIS - Val Saint Come||19/01/2014|
|1||FIS - Lake Placid||15/01/2014|
|15||FIS - Deer Valley||11/01/2014|
|3||FIS - Deer Valley||09/01/2014|
|2||FIS - Calgary||04/01/2014|
|2||FIS - Ruka||14/12/2013|