The 31-year-old 'Breakaway' hitmaker, who got engaged last year with Blackstock, will take the vows in Nashville, Tennessee and has already sent out the invitations which read 'Bookmark the date for the wedding of Kelly and Brandon,' reported Contactmusic.
"We're just kind of overwhelmed with the planning of the wedding. We're actually thinking fall this year and we're thinking outside. We're trying to make it small, but it is hard. I literally had a breakdown two weeks ago about the wedding list.
"I'm terrified of everyone watching me walk down the aisle." she said.
The couple have been dated each other for a year before getting engaged on December 14, 2012.