carrie-underwood-kelsea-ballerini We love Kelsea Ballerini. That’s it. Plain and simple. This 23-year-old Knoxville, Tennessee, native stole our heart three years ago when she boldly declared her youthful feminism in her debut chart topper, “Love Me Like You Mean It,” and dang it, she still hasn’t given it back. In fact, she just keep squeezing it. And…