Taylor Swift's "I Knew You Were Trouble" is the pop-country singer's biggest departure—part rock, part EDM, part dance. But Jessie J saw something a little different in the angsty Red track: a slow jam?

The British singer-songwriter went unplugged and got a little soulful for her live cover of "Trouble." And suddenly that guy who we were picturing punching in the face we're now thinking about texting again... Noooooo!

Jessie J's new album, Alive, is due out September 23.