"Rehab" works because refusal and discipline arrive together. Winehouse says no, but the band gives that no a bright, organized soul shape: drums, bass, piano, horns, and backing voices turning a private argument into a public hook. The lyric is defiant, funny, and exposed at once.

The darker admissions matter because the groove refuses to stop for them. Ray and Hathaway become credentials, the official questions become theater, and the need for a friend passes through a phrase already trained to keep moving. The song's meaning is not simple denial. It is the performance of control when the subject is control's failure.