Ruënna "Sugar" Mercelina (born January 18, 1992) is a Dutch Caribbean model, beauty queen and actress. In her work as a model, she appeared on the covers of the GO Weekly Magazine and Dolfijn FM Magazine. She is former titleholder of the Miss Caraibes Hibiscus Curaçao as well as the winner in Best in Evening Gown category. She is also the former Miss Teenager Curaçao, where she won the Miss Teenager Universe Congeniality Award. She completed her Marketing & Public Relations degree at the College of the Dutch Caribbean and is now majoring at the University of Curaçao in Education.