I was browsing through my iTunes cleaning up and went past "The Grey Album" and remembered how innovative it was.
I did some research and found out that Jay-Z was mashed up with many bands I'm fond of and I found the songs pretty great.
In case you didn't know, a number of years ago, Jay-Z released an a capella version of his "The Black Album" and several people have remixed it with other colored albums.

My favorite is "The Grey Album" from Danger Mouse. It combines The Beatles "White Album" with "The Black Album".

Another cool combination is with Radiohead's "In Rainbows" by Jaydiohead.

This type of mashup has been done with Weezer albums, Prince albums, etc.

Post anything similar to this because I'm currently pretty interested in them.

If you like rap and music from the 80's, then you might like this album:
Louis Logic & JJ Brown - Sin-A-Matic: the 80's Edition

Some examples:

This song mashes up Cutting Crew's - "I just died in your arms today"





This one mashes up Man At Work - Land Down Under: