Jack Irving, 19, West Bank Avenue, was working for promoters Cuffe and Taylor when he was approached by Rick’s management.
He said: “I was backstage helping with the stage set-up when Rick’s management approached me and asked if I would help out before he went on stage,
“At first I was a bit surprised and shocked, then the management mentioned Rick thought I looked similar to him and wondered if I would go up before he played.”
The theatre design student, who has just completed his first year at Central St Martins College, London, was asked to go on dressed as Rick and to start dancing.
He added: “Next thing I knew I was given a blue jacket, a banana as a microphone and told to warm up the crowd with the idea Rick would chase me off! I was quite nervous at first but I really enjoyed it.”