Taylor Swift's popular song, I Knew You Were Trouble, has a more dark tone to it. She sings about a bad breakup with a guy who toyed with her heart. In the music video, she talks at the beginning, saying at the end "I think that the worst part of it all wasn't losing him. It was losing me.". As for iffy lyrics in the song: "And he's long gone when he's next to me" and "A new notch in your belt is all I'll ever be". The song has a lot of deep lyrics too, with "Now I'm lying on the cold hard ground", "No apologies, he'll never see you cry. Pretend he doesn't know that he's the reason why you're drowning" and "And the saddest fear comes creeping in, that you never loved me or her, or anyone, or anything."