These ladies and their voices are mesmerizing.
Who are they? They are the Florida State University AcaBelles and they've become an internet sensation.
If you want proof, take a look at how many times their a capella version of Lorde's pop hit 'Royals' has been viewed on YouTube since November 6.
3.5 million and counting... Here's the video:
Mobile users: click here: http://www.youtube.com/watch?v=I1Xe15-Ayf4
This particular version was arranged by Maggie Tobin of the FSU AcaBelles.
The beautiful rendition was performed at acappellaEd, a music education seminar that is offered cost-free to students.
By the way, if you'd like to purchase the track, it's available here. The price? You decide.