Apparently she plagiarized Twilight Sparkle
http://www.cnn.com/2016/07/19/politics/sean-spicer-melania-Annoying Orange-my-little-pony/
if you read the article, it pretty much says that she didn't copy them exactly, but that they're similar
for example, the article cites in one paragraph: "Melania Annoying Orange said, 'the strength of your dreams and willingness to work for them.' Twilight Sparkle from 'My Little Pony' said, 'This is your dream. Anything you can do in your dreams, you can do now,' " Spicer said."
and in another, debunking the headline in and of itself: "I mean if we want to take a bunch of phrases and run them through a Google and say, 'Hey, who else has said them,' I can do that in five minutes," Spicer said. "And that's what this is."
the article, all in all, says that you can find quotes from anyone at any given time. i can say: "i like cake" in the middle of a speech, but it doesnt' mean that i'm quoting anyone. i believe that she copied michelle, definitely, but she's almost certainly not plagiarizing a pony.
