Call me sold, I love Pentatonix in all their acapella glory. I have said this before, that before Pitch Perfect I was never that big a fan, but they do an awesome job.
Pardon the "Aca" before the word awesome, but If you saw the movie " Pitch Perfect" you would understand that, that is how the actors talk during the movie. Proving that Acapella groups are now cool, and one of them recently put their singing talents to work.