Nashville is about get dirrty! Christina Aguilera has just joined ABC’s Southern soap in a major arc that kicks off this spring. So who is the pop icon portraying? Aguilera is actually going to bring a little pop to the country music business as Jade St. Nashville ‘s real-life sister duo Lennon and Maisy’s amazing cover of “Boom Clap” Jade has been going pretty much non-stop since she broke out in the music world 10 years ago and she arrives in town for a two-night stand at the Bridgestone, and a “vacation” from her life.