April Wine - Sign of the Gypsy Queen (1981)
This reached #57 in the US and #40 in Canada

http://www.youtube.com/watch?v=l38CIbuOPHw

Lorence Hud - Sign of the Gypsy Queen (1973)
This reached #16 in Canada

http://www.youtube.com/watch?v=Cc5VMTYF-hQ


-----------------------------------------


The Buggles - Video Killed the Radio Star (1979)
Written by Trevor Horn, Geoff Downes and Bruce Woolley, the latter whom was not a member of The Buggles.  Though it only reached #40 in the US, it topped the UK chart and reached #6 in Canada

http://www.youtube.com/watch?v=8IWPYB0WOaM

Bruce Woolley and the Camera Club - Video Killed the Radio Star (1979)
Woolley released his version first, and it reached #18 in Canada (was also a hit in several parts of Europe, but I cannot find any chart info on that).  Thomas Dolby was keyboardist for The Camera Club.

http://www.youtube.com/watch?v=ujTMETS1LC0

Laura Branigan - Gloria (1982)
Reached #1 in Australia and Canada, #2 in the US and #6 in the UK

http://www.youtube.com/watch?v=355Fk8drgZE


Umberto Tozzi - Gloria (1979)
This was a Top 40 in several parts of Europe

http://www.youtube.com/watch?v=KTM_qG_NPC8


----------------------------------------


Laura Branigan - Ti Amo (1984)
Reached #2 in Australia, #5 in Canada and #55 in the US.  Also made #100 in the UK, which technically is only bubbling under a hit as the UK chart only publishes a Top 75

http://www.youtube.com/watch?v=VLAryLQU-0E


Umberto Tozzi - Ti Amo (1977)
A Top 30 hit in several parts of Europe

http://www.youtube.com/watch?v=ZBFo9XCmSXs



------------------------------------------


Michael Bolton - How Am I Supposed to Live Without You (1989)
Reached #1 in the US, #2 in Australia and #3 in the UK and #8 in Canada

http://www.youtube.com/watch?v=RaPYcsv14Q0


Laura Branigan - How Am I Supposed to Live Without You (1983)
Michael wrote this song for Laura.  Her version reached #12 in the US and #46 in Australia, but was only an A/C hit in Canada, and failed to chart in the UK

http://www.youtube.com/watch?v=MN6JBTGcr68


-----------------------------------


Cher - I Found Someone (1987)
Written by Michael Bolton.  This reached #5 in the UK, #10 in the US, #12 in Canada and #17 in Australia

http://www.youtube.com/watch?v=14ZhIMmfRVM&feature=related


Laura Branigan - I Found Someone (1985)
Michael Bolton wrote this for Laura.  It only reached #90 in the US

http://www.youtube.com/watch?v=dy0q6X3KEgM

Blinded by the light - Manfred Mann

http://www.youtube.com/watch?v=xJh47LybCkU

Original by Bruce Springsteen

Speaking of Laura Brannigan --

Laura Brannigan: Self Control
http://www.youtube.com/watch?v=5IyAGpooGko

Original --

RAF: Self Control

http://www.youtube.com/watch?v=7w1Qo1awwI4

David Bowie: China Girl

http://www.youtube.com/watch?v=BzcCVGiP-OE&feature=related

Original --

Iggy Pop: China Girl

http://www.youtube.com/watch?v=9BBAEUOOFKQ

Soft Cell: Tainted Love

http://www.youtube.com/watch?v=oEh5pWjcWCg

Original --

Gloria Jones: Tainted Love

http://www.youtube.com/watch?v=NSehtaY6k1U

Sting: Russians
http://www.youtube.com/watch?v=wHylQRVN2Qs&ob=av2e

Original music: S. Prokofiev:  Lieutenant Kiji Suite; movement III: Romance
               
http://www.youtube.com/watch?v=cYoYRBRQ4ro

Kraftwerk: Tour De France

http://www.youtube.com/watch?v=dY1XZ02x0jo&feature=related

Generous amount of the original music --

Hindemith: Flute Sonata, Movement 1 "Heiter bewegtl"

http://www.youtube.com/watch?v=7SDklSi7RLo

I've posted this before, but it's worth a second (or third) mention...

Huey Lewis & The News - Heart And Soul (1983)

http://www.youtube.com/watch?v=8TdaXhpjHws&ob=av2e


Original:

Exile - Heart And Soul (1981)

http://www.youtube.com/watch?v=BtqveZAJspc

Jimi Hendrix - All Along The Watchtower  (origina & written was by Bob Dylan)

http://www.youtube.com/watch?v=AIhtafqZvy8

Burning Sensations: Pablo Picasso
http://www.youtube.com/watch?v=wD0JhbgYJqY

Original --

Jonathan Richman and The Modern Lovers: Pablo Picasso
http://www.youtube.com/watch?v=k43XjuhInkU


Violent Femmes: Children of the Revolution
http://www.youtube.com/watch?v=V2f08j7o8qs&feature=related

Original --

T-Rex: Children of the Revolution
http://www.youtube.com/watch?v=6u1CB5xzbm8
T

The Byrds - Mr Tambourine Man
(original by Bob Dylan)

http://www.youtube.com/watch?v=06rGW0AQGiY

I've posted this before, but it's worth a second (or third) mention...

Huey Lewis & The News - Heart And Soul (1983)

Original:

Exile - Heart And Soul (1981)


Definately worth a mention indeed.  The Exile version is great

Original:
Moon Martin - "Bad Case Of Lovin' You"

http://www.youtube.com/watch?v=gr3asMW4MJg


Cover:
Robert Palmer - Bad Case Of Loving You
http://www.youtube.com/watch?v=ekoH1Et2Vls

Not that I didn't know but I completely forgot about this one until I heard it on the radio the other day.  I remember the disco version more...

Knock On Wood
http://www.youtube.com/watch?v=92NpzXXpQtg

http://www.youtube.com/watch?v=YcJ0RgBNuEw

http://www.youtube.com/watch?v=1ztZ7WFo3nw