!song

Displays the currently playing track in the media request queue.

This command does not take any parameters.

!song

Rick Astley - Never Gonna Give You Up, requested by Aiden https://youtu.be/dQw4w9WgXcQ

!song (when track is from backup playlist)

Rick Astley - Never Gonna Give You Up, from backup playlist https://youtu.be/dQw4w9WgXcQ

In case no song is currently playing, returns the following:
No song is playing