J Marie Cooper admits that she doesn't want to lose to teenager Sophie Griffin in The Voice UK battle rounds tonight.
Will.i.am pitches experienced backing singer J Marie against the youngster, revealing: "J Marie is power house, Sophie, I want to challenge her. I want her to feel its impossible, to bring the best out of her."
Sophie confesses that she is nervous of facing the 27-year-old.
The Northern Irish singer admits: "I'm like Oh My God, she's so much better than me."
But Sophie blows away Will and J Marie in rehearsals.
"I'm actually surprised at how good she is, especially for a 17 year old," J Marie says. "It'd be gutting to be beaten by Sophie, because I want this so much.
"To not move on to the next level will be devastating."
Even the pair's coach, Will, confesses he was shocked by how powerful Sophie's voice is.
"I thought J Marie had it all sown up, and I thought and I felt bad for pairing them," he explains, "But then Sophie is all like dun de dun dun!"
The duo gives an amazing performance of Firework by Katy Perry, and Will's fellow coaches are split on who to take through.
But it's down to the Black Eyed Peas star alone, who confesses he's having a "nightmare" deciding between the pair.
Tune into [cat]The Voice UK[/cat] at 7:30PM tonight to see who he chooses...