A guest wearing a mask attends a traditional Carnival ball at the Copacabana Palace hotel in Rio de Janeiro, Brazil, Saturday, Feb. 25, 2017. In stark contrast to the hundreds of hard-charging street parties across Rio that are open to anyone, the ``Baile do Copa'' bills itself as a fairytale event where the country's elite can see and be seen in a hotel known for both opulence and a lengthy tradition of welcoming world leaders and stars. (AP Photo/ <PERSON>)