Carlos Santana didn't need Rob Thomas (Matchbox 20), Lauryn Hill, Dave  Matthews, Eric Clapton, Eagle Eye Cherry, or any of his other guest  performers to make a good album.  He didn't need them to sell a million  copies or ten million.  Santana has been around forever, everyone knows who  he is, and his album will hit triple platinum without anyone's help save  for his fans and his reputation.