Taylor Swift bends the rules, that much is clear. During her recent "Red Tour" escapade at the O2 Arena in London, the country-pop queen brought out a special guest for a performance of "Burn" -- that's right, songbird Ellie Goulding took the stage -- during the sold-out show on Tuesday, Feb. 11.
London, I could never thank you enough. See you next time! PS: short hair, don't care," Swift tweeted with a Polaroid of the two music superstars, written with the words "Ellie Forever."
Previously, Swift enlisted Goulding during her "Red Tour" in 2013, bringing her out for a lovely rendition of "Anything Could Happen" in August at LA's Staples Center.
"Burn" is lifted from Goulding's critically acclaimed Halcyon Days album.
Watch the two perform "Burn" together in the video above.