Acapella Group Pentatonix Salutes Rihanna

Apparently the acapella group Pentatonix has a thing for Rihanna. The group recently sang a whole medley of her hits and of course they did so without music. Singing acapella is no easy task because your vocals become the instruments, and it's all about pitch, tone, timing and overall good vocal quality. 

I'm a big fan of RiRi, she has hits for days, and I must say Pentatonix nailed this tribute to her.



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