Originally written by Leonard Cohen, “Hallelujah” is one of the most often covered songs of all times. This beautiful rendition of the song is done by an American a cappella group Pentatonix. Listen to their interpretation of the timeless lyrics, and be blown away by the performance. Can you believe that they are not using any instruments, and it’s all performed using only vocals?! I think it’s truly amazing – share the video with your friends and see what they think.