Country star Mark Chesnutt cancels his upcoming shows after undergoing emergency heart surgery when his health took a turn recently. The music star is currently recovering from an emergency quadruple heart bypass after experiencing a health issue over the weekend. The singer-songwriter told fans he was rushed to hospital on Sunday after symptoms started to appear. As a result, his shows have been canceled as he continues to recover. The celebrity said it was with a ‘heavy heart’ he had to step away from the upcoming gigs. Mark Chesnutt undergoes emergency heart surgeryThe county singer told fo…