The 6 are making a Stage for Serenade. Andy was trying to get Celestia, Luna and Cadance to use their magic to make a light show, but they believed Andy could do it.

Carmen: “It looks wretched enough already.”

Rainbow Dash: “Oh, come on, it’s fine.”

Carmen: “If you were raised in a barn! No offense, Diane.”

Diane: “None taken. ‘Specially since I wasn’t raised in a barn. My family just happens to have a barn, where I was born and lived in for my formative years..”