This entire song can be taken two different ways: One, Kanye is talking about his relationship with fame (pretty easy to see metaphor-wise). Two, he’s talking about a specific girl in his life.

Also seems easy to see (almost too easy, which is why a lot of people believe it to only be about fame), but the last lines of the song before Chris Rock comes in tells us that ‘Ye could be talking about a real person, and Chris Rock is sketching a real conversation 'Ye heard on the phone (titled “The Best Birthday”).

This song is especially interesting in its duality of being quite depressing, and having a hilarious outro (your mileage may vary, though).