So Jonathan Coulton did songs for portal (still alive) and portal 2 (want you gone) both sung by Ellen Mclain who is the voice of Glados the murderous AI who also happens to be an opera singer as well as a voice actor
anyway there was recently a portal game world for the "extract money from people by holding them upside-down and shaking then billing them again for shake fees" lego dimensions game and there is a third portal song that goes with it
this is that