Trailer music???Help PLEASE!

If you got the DVD, there is a preview for LIVE's new releases on dvds. What is that trailer music they are playing. It is also used in the MGM montage trailers(where they show a whole bunch of different movies-blown away, raging bull, etc). If you know the composer or title of the song or where i could download it, thanks a lot.

"When the streets are a jungle, there can only be one king!!!"