Martina McBride needs no introduction. — Although, Carrie Underwood will give the country legend, along with a slew of other trailblazers in the biz, a musical one when she opens tonight’s Academy of Country Music Awards. Carrie will perform a medley of hits from iconic country female singers, including, Patsy Cline, Loretta Lynn, Barbara Mandrell, Reba McEntire, Dolly Parton, and of course, the one and only, Martina McBride.