Justin Bieber - Let Me Love You (nstrumental) - D# major
Beyonce - Single Ladies (acapella) - E major, one semitone down, but up to speed of mental
UPDATE - thanks for previous likes, plays and downloads
Rearranged mental-parts, plus some extra bass, plus widening on mid+high.
Stereowidener, bass-EQ-cut and send reverb (and doubler) for the vocals.
Small repeat edit on the vocal @2.33 to stay on the beat.