All you people, can't you see how being a fan of the Backstreet Boys is affecting Taylor Swift's reality? After AJ McLean shared a medley of the band's "Everybody (Backstreet's Back)" mashed up with Swift's "Elizabeth Taylor," fellow performer Nick Carter made up a dance to it. "EVERYBODY's gotta love this mashup! We know we do @TaylorSwift," a Thursday, October 23, Instagram post read. Swift, 35, herself saw the video and was the first in the comments section, writing in all-caps to fittingly express her appropriate level of excitement.