Pentatonix are an a cappella group comprising Scott Hoying, Kirstie Maldonado, Mitch Grassi, Avi Kaplan and Kevin Olusola. The quintet released a video in late 2013, in which they covered The Harry Simeone Chorale's holiday classic
to the background of Los Angeles as a gift for their three million followers. The clip began with 6.4 million US Streams in its first week, resulting in it debuting at #13 on the Hot 100, which was coincidentally the peak position of The Harry Simeone Chorale's famous rendition of the song.
The song achieved a high chart placing as a result of a change in Billboard's methodology in February 2013, when YouTube views and other streams became a factor in tabulating the Hot 100. Baauer's chart-topping single, "Harlem Shake
" was the first song to benefit from the new policy.