Well, you can chock this up to one case of a cover being better than the original. Via YouTube:
Yesterday, PS22 Chorus was treated to its annual visit from our “older brothers,” Ithacappella! A musical explosion of epic proportion ensued, as both groups debuted and fused together our respective arrangements of “Don’t You Worry Child” by Swedish House Mafia! Afterwards, we had fun joining in on songs already in each other’s repertoire, which also came out amazingly and will be debuting soon….