I Gotta Feeling -

The melody centers on minor notes (the 3rd and 6th of the G scale), which can project a "lonely" quality even as the lyrics celebrate.

By repeatedly proclaiming that tonight will be a good night, the song places a "curse" on the actual event, echoing the forced enthusiasm of occasions like New Year's Eve. I Gotta Feeling

The song's upbeat energy masks a surprising musical structure that some theorists argue creates a subliminal sense of sadness or yearning: The melody centers on minor notes (the 3rd