It’s all the fault of `Hologram Tupac’. The idea of having “real” people on stage is horribly passé now and Usher is the latest to jump on the virtual bandwagon. For his London show on 11th June (which will be streamed on Vevo), fans can `join’ him on stage when he performs the track `Scream’. Fans can create their own avatars and have them jig and hoof about beside the actual Usher. It could be the least boisterous stage invasion ever.