Pentatonix put their spin on a Rihanna medley - and it is INCREDIBLE!

A cappella supergroup Pentatonix are back again and this time they're taking on the "evolution of Rihanna".

Performing 38 of the singer’s biggest hits, the seven-minute medley includes 'Umbrella', 'S.O.S.', 'Diamonds', 'We Found Love' and 'Pon de Replay'.

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The quintet - made up of Scott Hoying, Mitch Grassi, Kirsten Maldonado, Kevin Osusola, and Matt Sallee – sing in perfect harmony and transition from hit-to-hit seamlessly.

It's safe to say they have absolutely transformed Rihi's songs with their signature flawless style!