SPECIAL: Ludacris and Vanessa Hudgens are the co-hosts this year, which suggests the Billboard Awards this year are leaning heavily towards the younger audience members. But then how do you explain that one of tonight’s showcased artists, receiving a Billboard Icon award, is a musical act who could have headlined the bill 40 or 50 years ago? That would be the one and only Cher, slated to take the stage live from Las Vegas, which could almost, by now, be considered her native habitat. Also on the performing bill tonight: Celine Dion, Miley Cyrus, Lorde, Bruno Mars, Ed Sheeran, Drake, Imagine Dragons, Florida Georgia Line with John Legend, and others.