Miranda Lambert shocks fans, performs with Taylor Swift on tour

Taylor Swift returned to her country roots with the help of a special guest Wednesday night. Country music's reigning female vocalist joined the pop singer on stage for her "1989 World Tour" stop in Greensboro, North Carolina.

"Make some noise guys because Miranda Lambert is here," Swift told a cheering crowd.

Swift joined the newly single singer to sing Lambert's sassy hit "Little Red Wagon."

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