The new season of American Idol is already shaping up to be an emotional ride. In a sneak preview, contestant McKenna Breinholt has an unexpected reunion with her birth family in the middle of her audition. The video starts with the Gilbert, Ariz., native sharing a bit about her family. When judge Katy Perry asks her if anyone in her family is musically inclined, Breinholt reveals she is adopted. She learned of the adoption at a young age, and when she turned 21, she asked to be told everything she could learn about her birth family. Since then, she has been in contact with a few family member…