There have been a number of amazing "I Knew You Were Trouble" covers since Taylor Swift unveiled the song last fall, but this month the intriguing re-interpretations hit a fever pitch with new versions by Walk Off the Earth, Tom Odell, Selena Gomez, and Modern Family's Ariel Winter. Which is your favorite. Canadian quintet Walk Off the Earth caught everyone's attention last year with their amazing "shared guitar" cover of Gotye's "Someone That I Used to Know." Once again, they've placed an emphasis on originality of construction with their a cappella Taylor Swift cover, using impressive vocal techniques to essentially recreate the song just as it appears.