"Everything Has Changed (Taylor's Version)" is a song about realizing your life has flipped upside down after falling for someone new. The track appears on Taylor's fourth album, Red, and featured vocals from her close friend and first time collaborator Ed Sheeran.

The music video for the song follows a day in the life of two young children in the same elementary school class. They are both misfits and become close friends, but their platonic feelings turn to something more. At the end of the video, it is revealed that the girl is Taylor's daughter and the boy is Ed's son.

The hidden message for this song is "Hyannis Port" which is where Taylor spent 4th of July with Conor Kennedy.

Lyrics-

[Ed Sheeran]
(You good to go?)

[Taylor Swift]
All I knew this morning when I woke
Is I know something now
Know something now I didn't before
And all I've seen since 18 hours ago
Is green eyes and freckles in your smile
In the back of my mind, making me feel like

[Taylor Swift, Taylor Swift & Ed Sheeran]
I just wanna know you better
Know you better, know you better now
I just wanna know you better
Know you better, know you better now
I just wanna know you better
Know you better, know you better now
I just wanna know you, know you, know you

[Taylor Swift & Ed Sheeran]
'Cause all I know is we said, "Hello"
And your eyes look like coming home
All I know is a simple name
Everything has changed
All I know is you held the door
You'll be mine and I'll be yours
All I know since yesterday
Is everything has changed

[Ed Sheeran & Taylor Swift]
And all my walls stood tall, painted blue
And I'll take 'em down, take 'em down
And open up the door for you
And all I feel in my stomach is butterflies
The beautiful kind, makin' up for lost time
Takin' flight, making me feel like

[Taylor Swift & Ed Sheeran]
I just wanna know you better
Know you better, know you better now
I just wanna know you better
Know you better, know you better now
I just wanna know you better
Know you better, know you better now
I just wanna know you, know you, know you

'Cause all I know is we said, "Hello"
And your eyes looking like coming home
All I know is a simple name
Everything has changed
All I know is you held the door
You'll be mine and I'll be yours
All I know since yesterday
Is everything has changed

Come back and tell me why
I'm feeling like I've missed you all this time
And meet me there tonight
And let me know that it's not all in my mind

[Taylor Swift]
I just wanna know you better
Know you better, know you better now
I just wanna know you, know you, know you

[Taylor Swift & Ed Sheeran]
All I know is we said, "Hello"
And your eyes look like coming home
All I know is a simple name
Everything has changed
All I know is you held the door
And you'll be mine and I'll be yours
All I know since yesterday
Is everything has changed

[Taylor Swift, Taylor Swift & Ed Sheeran]
All I know is we said, "Hello"
So dust off your highest hopes
All I know is pouring rain
And everything has changed
All I know is a new found grace