Yes, I am making seasons of this thing. I guess this was the first. Mane 6 Acapella will return in August returning to 1 every fortnight :)

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