Lorde's 'Royals' is such a killer, catchy tune that it's no wonder there have been so many covers of it -- and all vastly different. Now we can add MKTO's to the list, under the heading "Cool Acoustic Cover With a Dose of Rap."

The duo behind the upcoming classic single 'Classic' performed the song live on SiriusXm Radio yesterday (Oct. 22). The smooth vocals of Tony Oller and deft rapping of Malcolm Kelley fit 'Royals' so perfectly we can't believe we haven't heard the chart-topping smash done this way before.

Lorde says she loves rap music -- maybe this will give her some ideas!