0Seinfeld Featured on Hip Hop SongIn what rapper Wale called 'the greatest day of my professional life,' Jerry Seinfeld joined him in the studio, ostensibly to record the 'Album About Nothing.' But the comedian would wind up sorely disappointed. (Skip to 1:10 for the Seinfeld bit.)Updated Apr. 21, 2017 10:10AM EDT / Published Jun. 24, 2013 11:19PM EDT