“Antebellum” is an Americanism that means “before the war.” In the United States, it is used to note something before the Civil War. People visiting the South can still see a number of pre-Civil War residences, which are called antebellum homes. (The prefix “ante” means before.)
Wikipedia says that the three members of the pop/country band “Lady Antebellum” had an interest in photographing large plantation homes in the South. In the course of this pastime they had an epiphany (a flash of insight) and decided that antebellum should be part of their band’s name.
The story below notes that guitarist Dave Haywood has asked his mom to the Country Music Association Awards, but she can’t go. (Dave, if you read this, call, text or tweet. I’m available.)