Pentatonix are an American a cappella group from Texas, featuring singers Scott Hoying, Kirstie Maldonado, Mitch Grassi, Kirstin Maldonado, Kevin Olusola and Matt Sallee.
The group won the American singing competition "The Sing-Off" in 2011.
They released their debut album, "PTXmas" in 2012, followed by: "PTX, Volume 1" (2012), "PTX, Vol. II" (2013), "That's Christmas to Me" (2014), "PTX, Vol. III" (2014), "PTX" (2014), "Pentatonix" (2015), "A Pentatonix Christmas" (2016), "Christmas Is Here!" (2018), plus 2018's: "PTX Presents: Top Pop, Vol. I".