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'The Voice' season 15: Team Adam's Radha and Reagan Strange battle it out in the Knockouts

Radha chooses to perform Carey's hit song 'I’ll Be There', while Reagan Strange opts to sing Calum Scott's 'Dancing on My Own'

The competition in 'The Voice' season 15 is getting fierce. The singers are all incredible with amazing voices, but unfortunately, there can be only one winner. With the Knockouts premiering next week, the contestants are preparing themselves to go head to head with another singer from their team with a song choice of their own in order to get a spot in the live shows.

Recently it was announced that Grammy-winning singer Mariah Carey will be joining the reality show as key advisor and will work with the coaches and their teams. Carey will help Adam Levine, Blake Shelton, Jennifer Hudson, and Kelly Clarkson mentor the top 32 artistes and narrow it down to the top four in each team.