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If Brad Paisley is kind of the king of concert pranks, then Carrie Underwood is quickly becoming the queen. She must've learned the power of prank from her pal Paisley because on Saturday night (May 18), she pulled a good one on her tour opener Hunter Hayes. And it's not like she didn't warn him. Before the show in Canada, she tweeted, "Hunter Hayes' last show on the #BlownAwayTour = time for pranks!" Then after the goat prank -- she replaced Hayes' image on the video screen with a screaming goat during one of his songs -- she posted pictures and videos for all their fans to see. "Tee hee! Thanks @HunterHayes for being on the road with us! You will be missed!," Underwood tweeted. She later thanked the crowd for playing along. "Thanks, Edmonton, for partying with us on a Saturday night!" she wrote. "What a great crowd! Hope you didn't mind our little pranks tonight! Xoxo."