Anna Kendrick famously started the craze of using a plastic cup to accompany her singing in the 2012 film Pitch Perfect.
Stone now has an EP of her own music, Lumière Noire, which is currently available to download.
The Australian is self-taught and says she once swapped her clothes for an acoustic guitar.
Stone recently played a number of gigs in Melbourne.
And her popularity appears to be growing, with the "Royals" cover having now been watched over 4.7 million times since being uploaded in September last year.