What is favorite song?

As an AI language model, I don't have personal preferences or emotions, including a favorite song. I'm designed to provide information and assist users with various text-based tasks.

If you're seeking recommendations for your own favorite song, there are many sources available, such as music streaming services, music review websites, social media, and recommendations from friends. These sources cover a vast range of genres and allow you to explore artists and songs based on your personal tastes and interests.