Actually I don’t understand why the Ariana Grande’s lamentation about a photographer to claim copyright over a photo he took of her should be either an issue or a news. A photographer is the sole owner of the pictures he takes, and if the portrayed person wants to use is it he must pay for that (remember the day of your wedding, and the fact that the photographer did not give you the film or the RAW files? This is why.) That’s the basis of the right of author law.
On ICT law, politics and other digital stuff