Out of all of the judges on NBC’s The Voice, you would assume the biggest Diva is Christina Aguilera. It appears that Adam Levine may take the title after the news that he refuses to perform on the season finale. Last season’s final 4 contestants will be performing with perform with someone famous. Dia Frampton with Kid Cudi, Beverly McClellan with Cyndi Lauper and Ce-Lo will perform with his former team member Vicci Martinez. However, last season’s winner Javier Colon will perform alone because according to a source “Adam said he would only consider collaborating with Javier for the performance if it was a cover. Not his original song. Javier wouldn’t budge and neither would Adam.” Of course we don’t know all the facts, but on paper Adam looks pretty bad.