Blackstreet - No Diggity (Acapella) F#m - 88,63 bpm
Sia - Cheap Thrills (Studio Acapella) F#m - 89,96 bpm
Norah Jones - Don't Know Why (instrumental) A# Maj (= relative major)
This started as Sia (A) over No Diggity (I).
Then I switched to No Diggity (A) and put both pellas over Norah Jones (I).
I also have a Blackstreet-pella-only version.