Jessie J - Defying Gravity (Radio 2 Piano Room)

The main themes in Jessie J's performance of "Defying Gravity" are:

Breaking Free and Self-Empowerment: The lyrics emphasize a strong desire to break away from societal rules and expectations (0:22-0:26), and to trust one's own instincts (0:39).

Courage and Taking Risks: The song highlights the courage to "defy gravity" (0:48), signifying a willingness to take risks and challenge what is believed to be impossible.

Individuality and Freedom: There's a clear message about flying solo and flying free (2:09-2:12), suggesting the importance of individual freedom and self-determination.