I believe in a thing called love - The Darkness.
This was an official DLC but looks like ubisoft removed it from steam stores in July (even the song pack with ballroom blitz where it was in). I don't know if this means you can make it CDLC now.
Tabs are available from the free version of Songsterr: https://www.songsterr.com/a/wsa/darkness-i-believe-in-a-thing-called-love-tab-s522