The December 14 episode, finale of The Voice’s 21st season  sprung a surprise with K-pop band BTS and Coldplay collaborating yet again as they performed their hit ‘My Universe.’ The K-Pop group performed their song with Coldplay as holograms. Coldplay on the other hand, performed live in the studio at Universal Studios Hollywood. Jennifer Lopez, won everyone over with her performance on the song On My Way, which features in her upcoming film Marry Me. Ed Sheeran mega mentor on the show sang his latest song Shivers. John Legend and Carrie Underwood. performed their duet, Hallelujah.