gets my vote too. the version on the Rollerball ST by Andre Previn is the best interpretation I've heard. Sublime.
If we're going classical let me add Bach's Aria in the library scene in Seven. The film is so dark, rainy, twisted, that this little quiet moment seems surreal. Bach's music is already surreal to begin with.
Hurt - Johnny Cash
Lover you Should've Come Over - Jeff Buckley
A Falling Through - Ray Lamontagne
3 Libras - A Perfect Circle
Something About Us - Daft Punk
I Wasn't Prepared - Eisley
Blue Heron - Sun Kil Moon
Tons of beautiful songs. The list can go on and on.
And for popular music there's so many...
Fields Of Gold - Eva Cassidy
At Last - Etta James
This Boy - The Beatles
Neither One of Us - Gladys Knight and the Pips
Cruel War - Peter, Paul and Mary
and this one I'll put up the video for....I don't know about most beautiful, but it makes me smile, has so many of the greats - many who we've lost, and it just reminds me of why I love music, Enjoy.......Knockin' on Heaven's Door - Dylans 30th
Moon River - Breakfast at Tiffany's
Heart of the SunRise-Yes
Turn of the Century-Yes
Somewhere Over the Rainbow -Big Iz,Judy and a most beautiful rendition done by Loudon Wainwright lll sung as a dirge at a memorial.
Tiny Dancer-elton john
Make me Love You - Bonnie raitt I thnk that is the name of it. The best "break up" song ever
Some that always do it for me
Jefferson Airplane - Comin' Back to Me
Billy Paul - Me and Mrs Jones
Van Morrison - Moondance
Dave Brubeck - Take Five
Dan Hicks and His Hot Licks - I Scare Myself
Frank Sinatra - Fly Me to the Moon
Traffic - The Low Spark of High Heeled Boys