It's not easy blazing a new trail in a genre as established as country music, but Mickey Guyton has made a name for herself doing just that. ET's Rachel Smith was joined by the 40-year-old songstress ...

Also on the lineup: Megan Moroney, Sophie Ellis-Bextor ... Ambor will perform "Belong Together," "Good to Be" and "Our Way," while Guyton will sing "My Side of the Country," "House on Fire ...