Guests included family, friends and both of Haywood's bandmates, Charles Kelley and Hillary Scott, who just tied the knot in January. Singer/songwriter Dave Barnes provided the music for the small ceremony, which was followed by dinner and dancing.
The bride, 30, wore a lacy white dress paired with a white flower in her hair. The groom, 29, wore a suit and tie.
Haywood and Cashiola, an executive with Warner Bros. Records in Nashville, have been friends for six years. They made their debut as a couple in November at the CMA Awards. The couple got engaged on Dec. 19 when Haywood spelled out "Will you marry me?" with Christmas lights on the side of her house.