The 24-year-old model - who was diagnosed with the skin condition vitiligo at the age of four - hopes her success will encourage other people to follow their dreams.
"We need to make sure that all bodies are celebrated and shown in a positive way - no matter what shape, condition, or colour it may be," she stressed.
Winnie, who will appear in the upcoming Sports Illustrated Swimsuit issue, cited Naomi Campbell and Tyra Banks as two of her biggest inspirations.
"They helped paved the way for our beauty to be celebrated. And of course, how can I forget the gorgeous Kate Upton, perhaps the most iconic SI model."

'Spider-Man: Brand New Day' opens to $355 million in US, Canada
Producer sues Netflix for $105 million over missing Nicolas Cage movie
BTS boycott Grammys over new Asian pop award category
Daily Mail seeks interim $13 million payment after Prince Harry loses lawsuit
It's official: Guggenheim Abu Dhabi to open on December 11
