Twilight Sparkle: >>643517
Fluttershy: >>647977
Pinkie Pie: >>659545
Applejack: >>661033
Rarity: >>661731
Rainbow Dash: >>662264
BONUS:
Sunset Shimmer: here
Trixie: >>1101086
Maud Pie: >>1101829
Original meme: http://mrpr1993.deviantart.com/art/Muscle-Adjust-Meme-199084197