. >> and christina aguleira is looking to take blake shelton down this time. >> reporter: the blind auditions almost always bring surprises. jordan smith may have been the voice's biggest surprise ever. >> you don't look like your voice, fyi [ singing ] >> reporter: his falsetto got him the nickname unicorn. >> >. you don't come across one very often. >> reporter: adam levine's guy won the season, and broke their record of song downloads. tonight they'll hear a new >> the -- auditions. >> the people i turn around for are people that sound different. >> reporter: but putting a finger on just what what is is tough. >> it's impossible to say why. >> somebody not as good just has a thing but you're like okay i need to turn around and see who that is. >> reporter: and when more than one coach turns around, the fun begins. >> right when i think okay i have this person on my team, i have no competition, i'm good, boom, there comes blake. >> reporter: but she's more than ready to take on the boys. >> >. we developed a new level ] >> i don't know why, but she copied me. >> reporter: and also try to co