“Real” is a loaded word in hip-hop, carrying connotations of honesty and authenticity that go beyond a rapper simply proving his or her street cred or dropping a few autobiographical details into lyrics. And all major stars in hip-hop seems to have their own ideas of how to define it. 2Pac's description of his work as “real” might be the same vision that Drake has when he uses the word today. But real heads know real when they hear it, and there are certain songs have become treasured as the moments when lyricist were especially vulnerable and revealing about their own lives, or just more perceptive about the world we all live in. These are 20 of Your Favorite Rappers' Realest Songs.