Lyrically, the "So Gone" protagonist sings about almost losing her mind over an unfaithful man. "The song is saying that I'm so gone that I'm not thinking straight," Monica told "Jet Magazine". "I do that sometimes because I'm pretty hard. She Elliott may have taken some of the real life from me and put it into song." Elliott proposed the singer to start rapping over the record — a venture, that would become "second nature" to her: "Missy kept telling me that I act like a rapper so she encouraged me to rap on 'So Gone' and 'Knock Knock'. She would put together rhythms." Elliott protégé, singer Tweet, and frequent collaborator, rapper Busta Rhymes, joined the recording sessions to provide vocals for a remix version of the song,