Twilight stared dumbfounded at the picture of herself merrily kicking a wastebasket in the CHS audiotorium. "That..." She looked back up at Vice Principal Luna. "I never did any of that!"
Luna gave a smirk that almost perfectly matched her counterpart, even without a muzzle. "Of course you didn't." She pushed the photograph closer to Twilight. "Feel along the edge of your body."
Twilight did so and gasped.
Luna clicked her tongue. "Literally cut and pasted. I'm more offended than anything, but the adhesive is still strong enough that I can't pop it off and see who's in the original shot." She bent the photograph to demonstrate, Twilight's body staying attached no matter what she did. Luna tossed it in a wastebasket and looked out of her office window. "Still, I think we both know the answer there."
Twilight scowled. Her fists clenched without her meaning to, like her wings had moved to her hooves. "Sunset Shimmer."
"Indeed." Luna turned back to face Twilight, this time with a look of respect she'd rarely seen from the princess. Other princess. "Whatever you're doing, Miss Sparkle, it's working. You've managed to do something I haven't in two years: You've frightened Sunset Shimmer. This sort of transparent frame job only happens when someone's running scared." Luna crossed her arms and tapped a foot. "Of course we don't have concrete proof, and calling you into my office won't help your reputation..." The tapping slowly came to a stop. "Unless..."
"Unless?" said Twilight.
"Follow my lead."
"Thank you for your assistance, Miss Sparkle." Twilight wasn't sure if there was a Traditional Vice Principal Canterlot Voice, but Luna was using it quite effectively. "This has cleared up any suspicion I might have had regarding you. Clearly someone else tried to sabotage the dance and make you take the fall. I can only imagine who'd have it out for a new student."
And as the students in the hallway began to murmur to each other, Twilight added another underline to the mental note to never, ever mess with Luna.