Miley Cyrus, a pop star promoted by Disney, began her career at the age of 11 with nearly all of her fans younger than herself. By the age of around thirteen her alter-ego the heavy make-up wearing Hannah Montana began wearing short skirts and thigh high stockings for her performances. At age 15 she posed topless and even took some racy pictures with her father. She also released some racy selfies on her facebook page. All this while she was heavily marketing products to preteens and most of her fans attending her concerts and buying her albums were preteens. At age 16 she began poll dancing as part of her routine squating with her knees spread open doing pelvic thrusts. While doing this she had icecream trucks as props trying to emphasize the image of preteen youthfulness while engaging herself in sexually suggestive behaivior. Her father responded responded to this by saying it's just about the art.
At the age of 19 she appeared completely nude in a video, began squating and spreading her legs in thongs,masturbating,performing topless, generally fondling herself, imitating sex acts, all while on live on stage. She also has a song called 'Molly' in which she openly promotes the use of dangerous and illegal drugs to children. She continues to emphasize a preteen image to her persona by having giant Teddy Bears on stage, performing in pigtails, wearing Mickey Mouse shirts. Even at this time she has huge amounts of very young pop stars. Under 18 girls and boys make up a large portion of any young female popstar nevermind someone like Miley Cyrus, who became a popstar as a preteen.
As far as I know children still attend her concerts and NBC is aware that many will be watching this openly sexually raunchy performance.