This week, a new set of determined challengers face-off against the four in front of a panel of industry experts: Grammy® Award-winning musician, record producer and songwriter Sean "Diddy" Combs, record-producing hitmaker DJ Khaled, and Grammy-winning recording artist and songwriter Meghan Trainor. Eight-time Grammy® Award-winning and multi-Platinum solo artist Fergie, will be by the contestants' sides as they battle to defend their seats in the competition.