Will.i.am and Danny O'Donoghue argued over David Julien on The Voice UK live shows tonight.
The Team Danny singer performed Maroon 5's She Will Be Loved as the remaining singers competed for a spot in the semi-finals.
Speaking before the performance, David revealed that there was a special woman who he would be thinking about when singing the track.
David's coach Danny said: "I thought this was a great way to paint you out, you quit your job to be here, what a great way to show the rest of the UK what can happen. I hope that whoever you were singing that for was watching."
But Will.i.am hit out at Danny's song choices, for the second time in the evening.
The Black Eyed Peas star said: "It was cool, it was real cool. I liked that.
"[But] This is a real critical part of the whole show. Two of Danny's artists are going to leave tomorrow and the way you guys are going about picking songs... it's like you aren't taking it serious. The arrangement and the ways you guys are performing is not at the level for this stage of the competition."
Danny quipped: "And your team was better?"
Jessie J then got involved to break the pair up, saying: "This is not about Team Danny or Team Will, it's about all of the artists and giving them constructive criticism."
With the time eaten up by the bickering, host Holly was forced to step in and move the coaches on in time for the next singer.
Watch [tag]David Julien[/tag] on The Voice UK below...