Top 10 Cross-Genre Collaborations (guestlist.net)

10. Driven To Tears – Robert Downey Jr and Sting
9.  Let Me Blow Ya Mind – Eve and Gwen Stefani
8. American Boy – Estelle and Kanye West
7. Take Off Your Cool – OutKast and Norah Jones

6. Numb/Encore – Linkin Park and Jay-Z
A perfect example of how well rock and rap can really work.  Even Linkin Park haters cannot deny this track is good. A very well-blended sound considering it’s the fusion of two vastly different tracks.

5. Heard Em’ Say – Kanye West and Adam Levine
4. You Got The Dirtee Love – Florence and The Machine and Dizzee Rascal
3. Dancing In The Street (1985) - David Bowie and Mick Jagger
2. Stan – Eminem and Dido
1. Walk This Way – Aerosmith and Run DMC.