‘The Voice‘ coach Christina Aguilera and finalist Tony Lucca have a history, the most recent of which is contentious. Years ago, they were both Mouseketeers. But there has been some sort of inexplicable ongoing beef all season long on ‘The Voice,’ as Xtina has consistently criticized the Team Adam contestant Lucca in a not nice way. We’ll say it: She’s been mean. It boiled over on last night’s penultimate episode, causing Lucca to publicly apologize for his role in the drama.