Rihanna - Rude Boy (acapella) 2 semitones lower with Elastique Pitch
Ed Sheeran - The A-Team (instrumental)
I remember Ouch Mashups telling me about the 'two' of Rude Boy, but I don't remember exactly how. This one took a lot of trial and improvement.
In a strange way this pella fits on Sheeran's guitar-driven mental, after changing it's structure and re-using the first part three times.
