Kanye West and friends Big Sean, Pusha T and 2 Chainz take their party to No. 1 on R&B/Hip-Hop Songs, as "Mercy" (2-1) gives Usher the boot after 10 weeks on top with "Climax" (1-2).
For the first time in more than a year, four of the top five on Billboard's R&B/Hip-Hop Albums chart are debuts. And, they're by four very varied artists.
