The first leg of the tour, which spanned 49 dates across North America, grossed a total of $55.1 Million, as reported by Billboard on July 15, 2014. One of the most lucrative concert tours of 2014, it was attended by 610,812 people so far.
I dont think it's because they're black but rather because of the type of music they make and the type of way they present themselves. Not overly enthusiastic about ******ry and weird clothes (gags), not bubblegum (katy, britney) and not mainly catering to tweens&teens (Taylor, Ariana)
I have 4 friends who like Ariana on FB though and they're all male and straight. It's because she's so hot, she will become a big sex symbol. She really is ridiculously good looking, and so petite