How to Play "Diamonds" によって リアーナ on ピアノ - Interactive ピアノ Tutorial 

You don't have to know how to read piano chords or piano sheet music in order to use this piano tutorial. Connect a piano keyboard or start playing on your computer keyboard right away! Practice one hand at a time, change playback speed, transpose to a different key, create loops to repeat, track your progress and much more. link