DepTraiVN.Com - Jonah Sin is the Mister Global Teen Singapore 2015 and he will soon compete in the Mister Global Teen 2015 pageant to be held on October 10 in Thailand. This 17-year-old hunk from Sengkang is taking up Financial Informatics at Nanyang Polytechnic. He is a self-confessed movie fanatic, and is passionate about bodybuilding and kickboxing.