Look at the stars
Look how they shine for you
And everything you do
Yeah, they were all yellow

"Rose Tyler, I can show you the stars. Anywhere in the universe. Where do want to go?" Her hair glinted under the lights in the TARDIS. Golden yellow, the Doctor thought.

I came along
I wrote a song for you
Oh what a thing to do
And it was called "Yellow"

"Rose Tyler, she has yellow hair! She doesn't give a care!" The Doctor crooned while Rose laughed.
"Yes, she had yellow hair!"

So then I took my turn
Oh what a thing to have done
And it was all yellow

The Doctor watched frantically as the Time Vortex glowed yellow in Rose's eyes. He kissed her. A blindingly special kiss. He had to save her, had to take his turn. He saved her with a kiss.

Your skin
Oh yeah your skin and bones
Turn into something beautiful

"How do I look, Doctor?" The Doctor turned, and his mouth dropped open. Rose was stunning.
"You look beautiful."

You know, you know I love you so
You know I love you so

The day the Doctor realized he loved Rose Tyler wasn't when they were fighting, or running. It was a night on the TARDIS, and Rose was curled up on the sofa, snoozing. The Doctor was reading. He stopped when she shifted and said something. He looked at her.
"Doctor."
He was in love.

I swam across
I jumped across for you
Oh what a thing to do
Cos you were all yellow

"We're blowing up a sun to say goodbye."
"I love you."
"Quite right. Well, Rose Tyler, I -"
It was cut off.

I drew a line
I drew a line for you
Oh what a thing to do
And it was all yellow

The Doctor never told her because, like he told her, she could spend the rest of her life with him, but he couldn't spend his with her. There were moments when he wanted to tell her so much, but didn't. So many times now lost.

Your skin
Oh yeah, your skin and bones
Turn into to something beautiful

"Remember when we stopped the Gelf?"
"Of course."
"That was the first time you told me I was beautiful."
"You're beautiful, Rose Tyler. So beautiful."

And you know
For you I'd bleed myself dry
For you I'd bleed myself dry
It's true

He had sacfriced himself for a simple human. His ninth regeneration. No, not a simple human. Rose, his pink and yellow human.

Look at the stars
Look how they shine for you
All the things you do

"So, Rose Tyler. When do you want to go, backwards or forwards?"
"Forwards."