KANSAS CITY, Mo. — Taylor Swift sang and danced through two epic shows at GEHA Field at Arrowhead Stadium last summer, and she busted loose again Saturday night. But this time Swift was in the crowd. Swift, who is dating Chiefs tight end Travis Kelce, joined others in an Arrowhead Stadium suite (including Donna Kelce and Brittany Mahomes) in the Swag Surfin’ celebration late in the 26-7 win over the Miami Dolphins in an AFC wild-card game at Arrowhead Stadium. That song is an anthem for the Chiefs. During a win over the Bengals earlier this month, Chiefs linebacker Willie Gay asked a cameraman…