Actress Julianne Hough was left deflated following the Costume Institute Gala in New York City on Monday (06May13) when her chauffeured limousine suffered a flat tyre. The Rock of Ages star donned a designer gown for New York's most fashionable event, also known as the Met Ball, which attracts a host of Hollywood stars and popular singers to the Big Apple. Hough was being driven to an afterparty when the car she was travelling in hit a pothole in the road, leaving the tyre flat. Her driver had to jump out and quickly change wheels before she could get on her way. Taking a snap of the tyre and uploading it to Twitter.com, she explained, "Hit a pot hole (sic) on the way to the met ball after party... Haha changing a tire in NYC!!!"