It has been nearly over two years since Chris Brown and Rihanna split up. Around that time it has surfaced that the duo made this song Put It Up for Chris Brown’s album X. This I must say is probably one of there best collaborative songs with each other and makes you wonder what other songs they duo may have hidden in the archive’s somewhere. 

https://m.soundcloud.com/kennythemixer/chrisbrown-rihanna-put-it-up