Just as I'm here thinking about the major decline in modern day R&B music, Raheem DeVaughn comes to the rescue. Raheem gets on some Curtis Mayfield type ish for the remix to "Bulletproof." I'ma have to agree with my boy Legend's sentiments, few rappers (if any) do it better than Ludacris when it comes to that feature spot on an R&B track.
Raheem DeVaughn "Bulletproof (remix)" feat. Ludacris