Music bible, Billboard have unveiled the list of the Top 50 R&B / Hip-Hop Artists of the Past 25 Years. The list, which is based solely on chart statistics, sees Whitney Houston, Mariah Carey, Janet Jackson, and Usher, all occupy spots in the top ten of the tally.

Where did they all rank, you may wonder. Peep the inevitably controversial list after the jump…

Click here to see the list

Your thoughts?