1、歌曲是《I Knew You Were Trouble》，这首歌是美国女歌手 泰勒·斯威夫特演唱的一首流行舞曲，歌词、曲谱由泰勒·斯威夫特、 马克斯·马丁和希尔贝克共同编写，后两位负责音乐创作。
2、该歌曲在全球16个国家的音乐排行榜名列前茅，于发布首周位居美国公告牌百强单曲榜季军，成为泰勒·斯威夫特第十三支打入该排行榜前十名的单曲，并于上榜第10周拿下亚军。
3、歌词如下：
(Verse 1)
Once upon a time, a few mistakes ago
I was in your sights, you got me alone
You found me, you found me, you found me...
I guess you didn't care and I guess I liked that
And when I fell hard, you took a step back
Without me, without me, without me...
(Pre-Chorus)
And he's long gone when he's next to me
And I realize the blame is on me, cause
(Chorus)
I knew you were trouble when you walked in
So shame on me now
Flew me to places I'd never been till you put me down
Oh I knew you were trouble when you walked in
So shame on me now
Flew me to places I'd never been
Now I'm lying on the cold hard ground
Oh oh trouble, trouble, trouble
Oh oh trouble, trouble, trouble
(Verse 2)
No apologies, he'll never see you cry
Pretends he doesn't know that he's the reason why
You're drowning, you're drowning, you're drowning...
And I heard you moved on from whispers on the street
A new notch in your belt is all I'll ever be
And now I see, I now I see,I now I see...
(Pre-Chorus)
He was long gone when he met me
And I realize the joke is on me
Hey!
(Chorus)
I knew you were trouble when you walked in
So shame on me now
Flew me to places I'd never been till you put me down
Oh I knew you were trouble when you walked in
So shame on me now
Flew me to places I'd never been
Now I'm lying on the cold hard ground
Oh oh trouble, trouble, trouble
Oh oh trouble, trouble, trouble
(Bridge)
When the saddest fear
Comes creeping in
That you never loved me
Or her... or anyone... or anything
Yeah
(Chorus)
I knew you were trouble when you walked in
So shame on me now
Flew me to places I'd never been till you put me down
Oh I knew you were trouble when you walked in
So shame on me now
Flew me to places I'd never been
Now I'm lying on the cold hard ground
Oh oh trouble, trouble, trouble
Oh oh trouble, trouble, trouble
I knew you were trouble when you walked in
Trouble, trouble, trouble
I knew you were trouble when you walked in
Trouble, trouble, trouble
参考资料：
1、《I Knew You Were Trouble》的歌词描绘了一个好女孩被坏男孩欺骗感情的故事 ，在歌词字里行间的微妙情谊与无限激流中，听者可以感受到歌曲所带来的震撼。
2、曲风多变的泰勒·斯威夫特，在《I Knew You Were Trouble》中尝试了 Dance-pop和Sock hop音乐。
3、在节奏上使用了电音 贝斯，部分歌声上运用了电音变声器效果，并融入大量 流行音乐、 Dubstep元素，背离了她之前音乐作品中的 乡村音乐风格，被认为是当时最不像“Taylor Swift”的一首歌曲 。