The Insider.com

Taylor Swift just dropped her highly anticipated dubstep track off her new album Red, I Knew You Were Trouble, where she once again dishes about an ex who did her wrong.

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"No apologies, he'll never see you cry/Pretends he doesn't know that he's the reason why," she sings.

But the catchy song also features a less wholesome Taylor then we're used to, when she sings, "Now I heard you moved on, from whispers on the street/A new notch in your belt is all I'll ever be."

Video: Taylor Swift Sees 'Red' In New Love Song

Ouch.

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But no matter which famous ex the song is inspired by, it's clear that the song shows musical growth on Taylor's part, namely, that she's willing to experiment with her signature pop country sound -- and to great results in this particular track!

Check out the video to hear Taylor's latest buzzworthy song.

Red comes out October 22.