'My Own Monster' by Katy Perry explores the internal struggle one faces with their own fears and insecurities. The song metaphorically talks about battling a 'monster' inside, representing personal demons, self-doubt, and the darker parts of one's psyche that can hold one back. The key themes include self-reflection, confronting one's fears, and the journey towards self-acceptance. Particularly poignant moments in the song include the depiction of the relentless nature of these inner battles and the courage needed to face and overcome them. This song is a powerful anthem about personal growth and resilience.