Pentatonix is an American a cappella group known for their unique vocal harmonies and innovative arrangements. Formed in 2011, the group gained fame after winning the third season of the television competition The Sing-Off. Their music spans various genres, including pop, Christmas, and original songs, showcasing their impressive vocal talents. The group consists of five members: Scott Hoying, Kirstin Maldonado, Mitch Grassi, Avi Kaplan, and Kevin Olusola. They are celebrated for their ability to create rich, layered sounds without any instruments, using only their voices. Pentatonix has released several successful albums and continues to captivate audiences worldwide.