Latest winner is from South Africa
                                
                                
                                    (Newser) -
                                    Demi-Leigh Nel-Peters, who represented South Africa, won the Miss Universe crown Sunday. The 22-year-old, who wants to use her reign to champion HIV/AIDS and self-defense causes, was crowned at the AXIS theater at Planet Hollywood on the Las Vegas Strip, the  AP  reports. "HIV/AIDS is a very big problem...