The song is funny. The gemara says in Taanis that Eliyahu Hanavi pointed out two people who were bnei olam haba. An Amora asked them what do you people do? They said we are comedians, and we cheer up depressed people. So bringing simcha into the world is a very high madreiga.
There is nothing wrong with the song.
I am a poet and I didn’t know it.