Em menos de 4 minutos, confira a evolução da música nas vozes do Pentatonix:
11th century:
Salve Regina 
1600's
Canon in D - Pachelbel
1800's:
Symphony No. 5 - Beethoven
1910's:
Danny Boy - Frederic Weatherly 
1920's:
Old Man River - Jerome Kern & Oscar Hammerstein II
1930's:
Minnie The Moocher - Cab Calloway
1940's:
Boogie Woogie Bugle Boy - The Andrew Sisters
1950's:
I Walk The Line - Johnny Cash
La Bamba - Ritchie Valens
1960's:
Stand By Me - Ben E King
Barbara Ann - Beach Boys 
I Want To Hold Your Hand - The Beatles
Respect - Aretha Franklin
1970's:
ABC - Jackson 5
Bohemian Rhapsody - Queen
1980's:
Celebration - Kool & The Gang
Don't Stop Believin' - Journey
Thriller - Michael Jackson
1990's:
Can't Touch This - MC Hammer
...Baby One More Time - Britney Spears
Say My Name - Destiny's Child
I Want It That Way - The Backstreet Boys 
2000's:
Hey Ya! - Outkast 
Drop it Like Its Hot - Snoop Dogg
Crazy - Gnarls Barkley 
Hips Don't Lie - Shakira
Single Ladies - Beyoncé 
I Kissed A Girl - Katy Perry
Bad Romance - Lady Gaga
I Gotta Feelin - Black Eyed Peas
2010's:
Baby - Justin Bieber
We Found Love - Rihanna
Some Nights - Fun.
Somebody That I Used To Know - Gotye
Gangnam Style - Psy
Call Me Maybe - Carly Rae Jepsen 
Os álbuns estão disponibilizados no Forum:
 
 
