Pentatonix is going from a 5 piece to a quartet: Avi Kaplan has announced that he's leaving the group.
In a lengthy Facebook message, he writes that leaving the Grammy-winning group is, "the hardest decision I’ve ever had to make in my life," but ultimately, he's tired of being away from his friends and family.
"I believe one of the big reasons why we have been so successful and accomplished all that we have is because of the unbelievably fast pace that we keep. Throughout my journey with PTX, this pace has always been a struggle for me," he writes.