March 25, 2014 -- The second week of battle rounds began on "The Voice" Monday night as more teammates were paired up for duets in front of Adam Levine, Blake Shelton, Shakira and Usher.
Each duet ended with one winner and one artist hoping that a competing coach would steal him or her.
Once again, the battle round advisers offered tips to the artists during rehearsals. Aloe Blacc assisted Team Adam; The Band Perry helped Team Blake; Blake's wife, Miranda Lambert, worked with Team Shakira; and Jill Scott advised Usher's crew.
Here's what happened during the two-hour episode:
Team Adam's Austin Ellis and Josh Kaufman were assigned Pharrell Williams' ubiquitous hit, "Happy." Shakira said it was one of the best battles of the season, in part because both men managed to win the audience over. Adam added that Austin and Josh were equals as singers. He named Josh the winner. Austin was not stolen by another coach, so he was eliminated.
Up next were Audra McLaughlin and the duo Alaska and Madi, from Blake's team. They tackled "When Will I Be Loved," originally recorded by The Everly Brothers and later covered by Linda Ronstadt. Shakira thought both artists were a little "over the top" at times. Blake agonized over the decision, but ultimately picked Audra. Adam desperately wanted to add Alaska and Madi to his team, but he used his two allotted steals last week.
Two of Shakira's artists, Deja Hall and Music Box, sang The Bangles hit "Eternal Flame."
Referring to Deja, Shakira said youth has its pros and cons. She mentioned Deja's lack of experience, but added that the 16-year-old has an angelic voice. She declared Deja to be the winner, after which Usher swooped in and stole Music Box. He told Music Box she has a lot of untapped potential.
Usher paired Madilyn Paige with Tanner James. The two performed "Everything Has Changed," Taylor Swift's collaboration with Ed Sheeran.
Adam joked it was "cute overload," like watching a pair of puppies in the field. Shakira agreed, saying it was sweet yet believable. Usher detected both playfulness and an aggressive nature within Madilyn, whom he named the winner. Tanner was not saved.
Josh Murley and Dawn & Hawkes, of Team Adam, joined forces on "Stuck in the Middle with You," by Gerry Rafferty's band Stealers Wheel. Blake said it was good, but there weren't any standout moments. Shakira said she doesn't drink, but the two acts made her want to have a beer. She added that she'd never heard the song before but she liked it. Dawn & Hawkes won the battle, but Josh was saved by Shakira.
The final battle of the night featured two of Usher's artists, Tess Boyer and Bria Kelly. They belted out Janis Joplin's "Piece of My Heart." Shakira felt they were evenly matched. Blake believed Tess was the stronger performer, but Usher went with Bria. At the urging of Adam and Shakira, Blake stole Tess.
The battle rounds conclude tonight at 8 p.m. Eastern time on NBC.