Sing it again: Songs you love, original and redone versions

I'm sure this type of thread has been done before, but I didn't want to go through the SportsJournalists.com graveyard to pull up a four-year-old thread. But if someone wants to dig through and refer to an older thread, go ahead.
This is about songs you love, both in the original version and also in a redone/remix/cover version.
I'll start it off with Eric Clapton's hauntingly beautiful "Tears of Heaven," originally written in 1991 after the tragic death of his young son. The song was released in his 1992 "Unplugged" album, earning three Grammys. To me, it's the best, most beautiful song he's done. By far it's not my favorite Clapton song to listen to because of the pain you can feel, but it's a beautiful tribute.
Here is a video from Clapton's 1992 MTV performance:

Clapton stopped playing the song in 2004, saying he no longer felt the pain.

The following year, the Osbournes got some musicians together and did a remix version of the song to benefit tsunami victims in Southeast Asia. Here is that version:

I absolutely love the original version. But the more I listen to the 2005 version, the more I think I prefer it. I particularly like the addition of Slash's guitar work and the harmony with Andrea Bocceli and Katie Melua starting at about 3:08.

What are some of your songs?

 

"Mercy, Mercy Me (The Ecology Song)" - Marvin Gaye and Robert Palmer
"Ain't No Mountain High Enough" - Marvin Gaye and Tammi Terrell/Diana Ross
"How Sweet It Is" - Marvin Gaye and James Taylor
"You Belong To Me" - Carly Simon and The Doobie Brothers
"Behind The Lines" - Genesis and Phil Collins
"Court of the Crimson King" - King Crimson and Steve Hackett (on "The Tokyo Tapes")

 

"Bull Doze Blues" - Henry Thomas, 1928

"Going Up The Country" - Canned Heat, 1968

 

'Such Great Heights' by the Postal Service and redone by Iron & Wine.

 

--Wild Thing by the Troggs, then by X
--Mama Weer All Crazee Now, Slade, then the Runaways
--Black Belly, Leadbelly, then Ram Jam

 

"Dark End of the Street" - James Carr and The Flying Burrito Brothers
"Jesus Was a Crossmaker" - Judee Sill and The Hollies
"Blues Run the Game" - Jackson C. Frank and Simon and Garfunkel

 

"Shake My Tree" - Whitesnake and Page and Plant (drum solo by Michael Lee on a bootleg live version of a P&P concert is the best I've ever heard).

 

"Raspberry Beret" - Prince and the Hindu Love Gods

 

Ryan Adams does a great version of AIC's "Down in a Hole." Were it not for Layne Staley being in one, it might be better than the original.

 

"Without You" -- Badfinger and Harry Nilsson

 

"Do Me Baby" Prince and Meli'sa Morgan

 

And Ben Folds.