Here is this week's M6A. This song has RD written all over it lol. It is The Greatest by Sia!

Applejack - Alto 2 (Lowest part)
*Bass Line
Twilight Sparkle - Alto 1 (Second Lowest Part)
*Percussion
Rainbow Dash - Soprano 2 B (Third Lowest Part)
*Lead Vocals  
Pinkie Pie - Soprano 2 A (Third Highest Part)
*Harmony 1 
Rarity - Soprano 1 B (Second Highest Part)
*Harmony 2 
And Fluttershy - Soprano 1 A (Highest Part)
*Harmony 3

#Mane6Acapella
#Rainbow Dash
#MuseScript