Calvin Harris is set to sign a mini-residency deal in Las Vegas. The 40-year-old DJ is reportedly set to earn around £1.2 million a night after negotiating a deal with Fontainebleau’s LIV club. A source told The Sun newspaper: “Calvin is a legend on the strip and he’s helped make Las Vegas clubs the place to be. LIV are booking him in for six huge headline slots and are trying to negotiate more.” Calvin has previously performed at some of the best-known nightclubs in Las Vegas, including Hakkasan and Omnia. And Calvin is currently being lined up for a return to Sin City before the Super Bowl, …