MIAMI -- Concert-goers had packed a Miami arena expecting Reggaeton artist Farruko to perform his hit “Pepas” — a club sensation and party anthem since its summer release.But Farruko refused to sing the song in full, leaving out rousing choruses about taking drugs and partying, and apologizing for those lyrics. He spoke profusely about God throughout the concert and lit a cross in neon pink, leaving fans stupefied and questions swirling around the future of his music career.The Puerto Rican singer is not the first artist to make a dramatic transformation, but this one seemed to happen on stage in real time last Friday, catching fans off guard.