“Applejack: “… And this daughter, it is how we choose your name”  
Applejewel: “Are you saying you chose my name, thank to your disque performance of a sexy socialite model called Applejewel?”  
Applejack: “Well … I didn’t wanted to put you that name, but your mother Rarity insisted to put it to you, since she says that I looked so… so sexy when I acted like that! Starts laughing  
Applejewel: “…”
 
… And that’s why my friends, the youngest daughter of Applejack and Rarity is called “Applejewel” like Applejack when she acted like a socilite pony to compete with Rarity. XD”