A stunt at Belgian festivals this summer saw a hexacopter PartyDrone play attendees their favourite song as they collected tickets and entered the festival area.

Mobile carrier BASE, which offers customers discounted access to Spotify Premium, invited people to add their favourite song to the BASE Summer Festival Spotify Playlist when they registered for festival tickets.

Attendees were identified when collecting the tickets, upon which the specially designed drone was deployed and played the person’s song of choice, along with ...