Stop whatever you're doing, and watch Pentatonix's a cappella rendition of Ariana Grande and Iggy Azalea's "Problem" right this second -- unless you're, like, helping a senior citizen cross the road or reaching for an EpiPen or something. Those take priority, I guess.

Amazing, right? That shouldn't surprise you, considering the quintet won season 3 of NBC's "The Sing-Off." Oh, and two of Pentatonix's members, Mitch Grassi and Scott Hoying, slay pop-diva discographies on the regular via their YouTube channel, SUPERFRUIT.

As the members of Pentatonix note at the end of the video, "Problem" is the first single off of PTX, Vol. III, the group's new EP set to be released on September 23. You may now resume all regularly scheduled activities.