By Brandy McDonnellThe battle is on for Oklahoma singer Kailey Abel. A music therapy major at Tulsa's Oral Roberts University, Abel will be featured tonight's Battle Round episode of "The Voice" Season 18. As previously reported, Abel, 20, of Verdigris, tried out for two previous seasons of the hit singing competition and this time finally got the chance to audition for the coaching panel.Read more on NewsOK.com