Taylor Swift set an attendance record at the 14th annual Country USA festival in Oshkosh, Wis., on Wednesday night (June 24), according to event organizer Dan Leibhauser. Swift brought in 42,000 fans to the festival grounds, Leibhauser told the Oshkosh Northwestern newspaper. He also said one of the vehicles used in Swift's tour jackknifed on one of the exits, leading to waits of two hours to leave the festival grounds. Montgomery Gentry headlined Country USA on Thursday (June 25). This weekend's performers include Brad Paisley (June 26), Dierks Bentley (June 27) and Gretchen Wilson (June 28).