Keyshia Cole's "I Changed My Mind" (2004)
Album: The Way It Is
Producer: Kanye West
Kanye West is the kind of guy who demands attention. So when he says that he's "on the track, by the way" near the beginning of the song, you know you ought to move your hand away from the fast forward button. West doesn't spit a verse on the song, but his ad-libs are welcomed on any track. Sometimes presence is all you need.