A Cappella Group Pays Tribute To Michael Jackson With An Epic Mashup (Video)

Dear other a capella groups, you guys need to beat it.

The members of Pentatonix made careers out of having mouths that, together, sound like a mixing board. The small -- but powerful -- group capitalized on its a capella skills enough to generate sold out US tours, movie cameos and even having my mom know its name. That is a big deal.

Just like long-term lacrosse and improv careers, a capella jobs outside of college are hard to find. You have to be really good in order to generate any form of income from turning your mouth into a full symphony orchestra.

Pentatonix is that good.

Now, the former winners of "The Sing-Off" are back with a jaw-dropping aca-mashup that pays tribute to the King of Pop.