According to Osho, he sings and dances every moment—literally, as a spontaneous celebration of being. When awareness flowers, joy overflows by itself; true laughter, song, and dance are not performed but happen, like breathing, without a doer. What most call celebration is a cover for misery; his joy is uncaused and continuous. Ultimately, it is existence—'God the ventriloquist'—that sings and dances through him.
Yes—real joy moves by itself inside him all the time, like breathing, and it’s life (God) doing the singing and dancing, not a personal act.