By Olivia Wheeler Britain’s Got Talent viewers got more than they bargained for on Saturday night’s episode with one act’s surprising audition. During the latest instalment, Kimberly Winter appeared on stage, where it looked like she was going to sing ABBA but instead started burping, as she belched The Winner Takes It All. The judges were left completely stunned over the surprise with the audience also left gobsmacked. After the windy routine, Simon Cowell quipped: “We weren’t expecting that, did you really fly in from America to burp at me? Really? It was so stupid, it was brilliant, really,…