Where's the Fun in That?

After using Bat-Mite's powers to overwhelm Batman, as the Joker plans to kill him, Harley Quinn suggested finding out who he really was first. Joker refused, saying "where's the fun in that?", and began to sing while using his powers to remake the world in his image.

Lyrics
You can be a goody two-shoes 'till the end of your days, You can listen to them say crime never pays, You can follow every law and fear the big black bat, But why would you want to? Ha! Where's the fun in that? Where's the fun in that?

So, smile, darn you, smile! Everybody loves to grin! Follow my lead, recite my creed, and smile, darn you, smile!

Don't listen to the dullards say that life is a bore, Those fuddy-duddys spoil my fun! That's why I strive to eradicate gloom! It's from that itch, I made the switch, And chose my nom-de-plume: The Joker! There's the fun in that! Ha ha ha! There's the fun in that!

So, smile, darn you, smile! Everybody ought to laugh! And so with glee, I do decree; Just smile, darn you, smile!

So, when living gets a little rough, and you find it hard to cope; I'm the gent with just the stuff, to fill you full of hope! Just smile, darn you, smile! Everybody needs a clown! Now with one stroke, the final joke! Just smile, darn you, smile, darn you, smile! Everybody loves to grin! Follow my lead, recite my creed; And smile! Ha! Darn you, smile! Ha ha ha ha ha ha! I love it!