Kelly Clarkson has a tough call to make as the Knockout Rounds kick off Monday on !In a sneak peek shared on Friday, the coach tees up the first Knockout performances of season 23, pitting Cait Martin and Kala Banham against one another for the chance to represent Team Kelly in the live playoffs.Cait takes on a tall task, performing Whitney Houston's «All the Man That I Need,» while Kala delivers an emotional rendition of The Goo Goo Dolls' «Iris» that leaves their coach dreading the decision she has to make.«I'm so angry, you both did such a great job!» Kelly bemoans, hiding behind her hands.«I'll throw in my two cents, which is not going to matter to Kelly,» Blake Shelton begins, saying that he heard some sharp notes in Cait's performance, and praising Kala's «passionate performance.»Niall Horan and Chance the Rapper both praise Cait for tackling a Whitney song, and while Niall is leaning toward Kala, Chance insists, «I just wanna emphasize that Cait just smashed that. That was spot-on Whitney.