Been meaning to cover this song for a while. Another appropriate choice for lead vocals. Imagine Rainbow Dash surviving in an apocalypse.

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)
*Guitar
Rarity - Soprano 1 B (Second Highest Part)
*Harmony 1/Backing Singer 1
And Fluttershy - Soprano 1 A (Highest Part)
*Harmony 2/Backing Singer 2