Country couple Tim Mcgraw and Faith Hill have been forced to scrap a concert in Knoxville, Tennessee this weekend (23APR06) because their stage set is too heavy for the proposed venue. Officials fear the couple's suspended Soul2Soul set will bring the roof of the Thompson-Boling Arena down and so the show has been cancelled. Concert refunds will be offered. The couple's US concert tour begins in Ohio on Friday (21APR06).