Even though this is the "age of the remix", some of these are just gawddamn genius.
Snoop Dogg "Signs" vs. Foreigner "Urgent"
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/VIK9E8DyMCo"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/VIK9E8DyMCo" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>
Jimi Hendrix "Voodoo Chile" vs. Snoop Dogg "Drop It Like Its Hot"
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/KnyMt4VqOuo"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/KnyMt4VqOuo" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>
The Game vs. Eric Clapton
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/lcgEXsdhBQM"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/lcgEXsdhBQM" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>
Tweet vs. Black Crowes
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/UgY3ao39X88"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/UgY3ao39X88" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>
Tom Petty vs Rob Base
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/PoUiqdZIoqs"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/PoUiqdZIoqs" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>
Black Eyed Peas vs Max Graham vs Yes
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/jyhcDXE_8HQ"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/jyhcDXE_8HQ" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>
Pussycat Dolls vs Michael Jackson
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/_bLr1nifF78"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/_bLr1nifF78" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>
Def Leppard vs. Nelly
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/aZhbfpcCUUI"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/aZhbfpcCUUI" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>
The Rasmus vs. Gun
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/IHaQmxS6_i4"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/IHaQmxS6_i4" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>
More?