This one is from a vocal quintet called Pentatonix with guest star Todrick Hall. I had not realized that the entire group was the product of reality television - the winners from Season 3 of the Sing-Off. They are a very young posse in their early 20s with incredible vocal range who are setting out to redefine modern pop music with vocal flair. Todrick is known for slick commericial mash-ups and this feature is certainly that and more. Almost like a mini- Baz Luhrman music video featuring everyone from Adele & Gotye along side the original Arlen classics we love. Makes you wanting more from them and I will surely be checking them out.