“What’s up, baby?” asks Prince Royce at the beginning of his latest single, “Back It Up,” featuring Pitbull and Jennifer Lopez. “It’s your new boyfriend.” For many, Royce is the same boyfriend they’ve imagined having for years. At 26, he’s already a bachata and Latin-pop superstar, with videos that have racked up nearly half a billion views and a collection of albums packed with romantic hits like “Darte un Beso” and his cover of Ben E. King’s “Stand by Me.” With Double Vision, his fourth LP and first in English, Royce is preparing to reintroduce himself and, hopefully, reach a bigger audience than ever.