Pentatonix deliver an emotional cover of 'Imagine'

Pentatonix have a powerful message in their latest video. The hugely successful acapella group are back with a cover of John Lennon's 'Imagine'.
The performance has been viewed millions of times of times online and has really struct a chord with their fans.
'This song is honestly so beautiful and I actually cried' admitted one viewer. Another person praised the group saying 'I've got chills down my whole body. very well done, Pentatonix!'
Check out their performance in the video above.