Happy - Pentatonix (Pharrell Cover)

pentatonix
penatonix
ptx
ptxofficial
mitch grassi
kirstie maldonado
scott hoying
avi kaplan
kevin
olusola
k-o.
cello
cellobox
beatbox
a cappella
harmony
acapella
acappela
choir
singing competition
the sing-off
sing-off
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sing
singing
chorus
sara bareilles
shawn stockman
ben folds
ben folds 5
american idol
x-factor
the voice
voice
pitch perfect
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