Acapella Group Perform Incredible 'Evolution Of Beyonce'

Fresh off their win at the first-ever YouTube Music Awards Sunday, The Pentatonix acapella group performed an amazing medley of Beyoncé hits on Monday's "Ellen."

But the singing group aren't new on the scene.

They won season 3 of NBC's "The Sing Off" and have 150 million views on YouTube on their viral music videos.

Check out The Pentatonix performing a mashup of Beyoncé hits below:

Now watch the group's incredible "Evolution of Music" medley:

For more music videos from The Pentatonix, click here >