The 2018 Billboard Music Awards hit a new low Sunday night in the coveted demographic of ages 18-49, dropping 10 percent from last year’s low in overnight numbers. According to Variety, the three-hour music award show broadcast from the MGM Grand Garden Arena in Las Vegas scored an average of 2.1/8 share in the key demographic with 7 million viewers. In comparison, the 2017 awards show, which aired on ABC, averaged a 2.3 in the 18-49 age group with 7.7 million people tuned in. Jennifer Lopez performs onstage during the 2018 Billboard Music Awards at MGM Grand Garden Arena on...