Anderson will be familiar to Swift superfans. She regularly pops up in behind-the-scenes videos, Swift's Instagram and even her lyrics, getting a callout in early Swift song "Fifteen."
"My date to the Grammys is........ @abigail_lauren!! We'll try to dress as well in 2015 as we did in 2005.#GetReady," Swift captioned the below goofy throwback picture.
The photo is great evidence that Anderson can match Swift goofy dance move for goofy dance move -- very important for Sunday's cameras.