Diamond Trade - "Diamond is Forever" Commercial?

Question

What is the artist/title of the song in the Diamond Trade's "Diamond is Forever" campaign commercial?
The lyrics are: "How can I tell you I love you, I love you, I long to tell you that i'm always thinking of you, i'm always thinking of you.. But, I can't think of right words to say"

Answer 1

It's a cover of Cat Stevens' song "How Can I Tell You" and is sung by a girl from the band Cat Power named Charlyn "Chan" Marshall.
Here's a link at wikipedia: http://en.wikipedia.org/wiki/cat_power... If you scroll down to Trivia the very last one talks about this and if you scroll down to external links it has a link to the commercial on youtube.
Unfortunately the song has not been released to the public.

Answer 2

Cat Stevens
How Can I Tell You


How can I tell you that I love you, I love you
But I can’t think of right words to say
I long to tell you that I’m always thinking of you
I’m always thinking of you, but my words
Just blow away, just blow away
It always ends up to one thing, honey
And I can’t think of right words to say
Wherever I am girl, I’m always walking with you
I’m always walking with you, but I look and you’re not there
Whoever I’m with, I’m always, always talking to you
I’m always talking to you, and I’m sad that
You can’t hear, sad that you can’t hear
It always ends up to one thing, honey,
When I look and you’re not there
I need to know you, need to feel my arms around you
Feel my arms around you, like a sea around a shore
And -- each night and day I pray, in hope
That I might find you, in hope that I might
Find you, because heart’s can do no more
It always ends up to one thing honey, still I kneel upon the floor
How can I tell you that I love you, I love you
But I can’t think of right words to say
I long to tell you that I’m always thinking of you
I’m always thinking of you....
It always ends up to one thing honey
And I can’t think of right words to say