Taylor Swift performs "I Knew You Were Trouble"!

Hey M Girls,

We're more than just a tad obsessed with Taylor Swift's track, "I Knew You Were Trouble" -- it's just SO catchy! While in Australia, Tay paid a visit to the today show to perform the hit! Check out the awesome performance here:

Sounds awesome, lady!

Let's dish:

-What did you think of Taylor's performance? Which of her newest songs is your fave?