Team Christina Aguilera members Chris Mann and Monique Benabou were tasked with performing a duet of Celine Dion's 'The Power of Love' on 'The Voice' tonight (March 5.) We must say that Xtina chose wisely for her charges. Doin' Dion is always a challenge, since few (if any) singers have the same range as the Canadian diva. But these two? They owned this song, belting it out as if they wrote the lyrics and were actually in love with each other.