If you ask the judges, the best singer was saved for last during Monday night's episode of 'The Voice' on NBC. Four of the 12 singers will be sent home after Tuesday's results show, but if viewers are as enthusiastic about Jesse Campbell as Adam Levine was, the single father should be safe.

Campbell was dressed for winter, looking stylish as he sang Louis Armstrong's 'What a Wonderful World.' It's a song the Chicagoan said was indicative of who he is and where he came from. Earlier he revealed that after his wife left him and his daughter, they were forced to live in his car. "To me this is life or death," he said.

Campbell's version of the classic was smoother and more jazzy than the standard interpretation. He added some R&B sensibility to the song, but never missed a note while trolling up and down scales. Cee Lo Green told him his performance was a beautiful as his hair (a wig for tonight's episode) and added that if one of his team members doesn't win he's pulling for Campbell.

"You're the dude to beat," Levine said. Christina Aguilera barely got a chance to praise her singer as time ran out on the episode. Host Carson Daly did have enough time to explain the format more thoroughly. After the bottom three from Team Blake and Team Christina are revealed on Tuesday night, they'll have a chance to sing for their lives on the show. Ultimately two singers from each team will be sent home, and two from Team Adam and Team Cee Lo next week.

Watch Jesse Campbell Perform 'What a Wonderful World' on 'The Voice'