http://www.youtube.com/watch?v=qJos0ifG7T0
It won Grammy Awards for Best Rap Song and Best Rap/Sung Collaboration at the 54th Grammy Awards. It was produced by West and features additional vocals from several other recording artists, including John Legend, The-Dream, Elly Jackson, Alicia Keys, Fergie, Kid Cudi, Elton John, and Rihanna.
via Wikipedia.