Ms Beck said winning the supreme award was unexpected.
"Everyone there had amazing designs, techniques and sewing skills, it was crazy they picked me," she said.
"As my outfit was really out there, I knew they would of either loved it or hated it, and they loved it."
The talented teen was also approached by the judges and offered advanced placement, giving her automatic entry into the Otago Fashion Design School.
Ms Beck said studying at Otago Fashion Design School would be beneficial for her future and was hopeful for the opportunity to be picked up by some of the industry's top designers.
"It also gives me a chance to work with colours and textures a bit more, not like I would get to do when I am at home."
NZ Fashion Design Tech chief executive and judge Val Marshall-Smith said judges were impressed with the sophistication of Ms Beck's designs.
"There were a number of other entries but hers was a standout," she said.
"The reason it was stand out was because it fit the brief and the level of detail and thought that had gone into creating her designs was quite exceptional for one so young."
She said NZ Fashion Design Tech scholarship had seen young designers travel to India for a six-week scholarship and offered opportunities for them to shine in the fashion world.
Walk the Line show organiser Matt Goldsbury said Ms Beck's minion menswear design stood out from the others because of its point of difference.
"No-one had seen a suit with that design on it and the colours on it were very cool," he said.
"The detail in how it was made is what I think the judges liked. Up close, you could see the work that was put into it which was impressive."
Ms Beck's mother Donna Beck said the calibre of talent with young and emerging designers in New Zealand was "massive" and she was extremely proud of her daughter.
"[I am] thrilled her hard work, passion and creativity has been recognised at this level," she said.
"She certainly has some decisions to make but she has a bright and creative future ahead of her."