Former Plastics Amanda Seyfried and Ashley Park Sang Taylor Swift's "Mean," and It Was So Fetch!

Once a plastic, always a plastic. During the Williamstown Theatre Festival in Massachusetts, Mean Girls alum Amanda Seyfried joined Ashley Park, who originated the Broadway role of Gretchen in the Mean Girls musical, for a totally fetch performance. The ladies kicked things off by dedicating Taylor Swift's "Mean" to all the Regina Georges out there, before singing Lily Allen's "F**k You." In addition to sneaking in a few Mean Girls references, Park donned a "Fetch" shirt while Seyfried wore a black tee with a backwards "K" like her character, Karen, in the movie.

"Fetch fun singing with @mingey 💖," Park captioned the video on Instagram. "To the Regina George's out there. Be nice! Xo, Gretchen & Karen 🚺💕" As Seyfried pointed out in the video, Mean Girls isn't the only thing the ladies have in common. While Park is playing Thomas Sadoski's wife in the new show, Grand Horizons, Seyfriend "plays his wife in real life." How many times will I replay this video? The limit does not exist!