Ricky Martin opened the Viña del Mar music festival in Chile with a sold-out show, where he traversed some of his greatest hits, from “Vuelve” to a reimagined “Livin' La Vida Loca.”Playing to an adoring crowd of more than 15,000, an emotional Martin -- who last played this venue six years ago -- was generous with his playlist, performing for more than 90 minutes and picking up a silver and gold seagull (Gaviota de Plata y de Oro), the symbolic trophies that the crowd at Viña del Mar, known as