A tonight's 2012 Paralympics closing ceremony in London, Jay-Z made a special appearance with his buddy Chris Martin's band Coldplay, and spit some new bars on their song "Paradise." Rihanna also made an appearance with them for a performance of "Run This Town." Watch footage of Jay's new verse on "Paradise" above, which starts off, "From the projects to the podium/Accepting awards with my Roley on." Hov!

[via DJ Semtex]

Update. Here is the "Run This Town" performance, as well as a clip of Rihanna doing "We Found Love" with Coldplay, thanks to Miss Info.