32. "Love Game" feat. Kendrick Lamar (2013)
This deranged dark comedy about how dangerous love can be isn't what most fans expected from two of hip-hop's most skilled lyricists. You can thank Rick Rubin, who sent Eminem the cheery, oldie-but-goodie loop (built on Wayne Fontana and the Mindbenders' 1965 smash "A Groovy Kind of Love") because he couldn't hear anyone else over it. ("I don't know if I want to hear Jay-Z on that record," he said to Complex.) But it was Em's idea to feature Kendrick Lamar, whom he'd recently met, to Rubin's surprise. Even Em got more than he bargained for out of the collaboration. When the two MCs met at the studio, Eminem kicked out Lamar's crew, as if to see whether his guest indeed wrote his own lyrics. Not only did Em get a hook and an outrageous Slim Shady-esque verse from Lamar, but he also had a song that forced listeners to reckon with the conceptual genius of both rappers.