Country star Luke Combs (36) started his three-day residence in London's Wembley Stadium with a special surprise guest – and provided a memorable moment. On the first evening, the American singer brought the former Chelsea captain John Terry on stage. Together they drank a beer during the Combs hit "1, 2 Many", but instead of cheering, the stadium audience received the former football pro with loud shouts. Terry did not let himself be deceived b…