's season 20 Knockout Rounds — and two of Kelly Clarkson's youngest team members are giving it all they've got to make it to the live shows!In ET's exclusive sneak peek at the final Knockouts, Anna Grace and Gihanna Zoe face off in one of the last head-to-head showdowns of the season, putting their vastly different, but equally impressive, vocal skills on display.First up, Anna slows down The Band Perry's «If I Die Young» to turn it into a dreamy, ethereal ballad that earns audible reactions from Kelly, John Legend and Blake Shelton.Then, Gihanna soars through her soulful rendition of Pink's «Glitter in the Air,» showing off her stunning belt and even more impressive control during the song's quieter moments.«This is not gonna be a fun one.
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