How 'The Pitt' season 2 ends for ER staff, that blowout karaoke scene

"The Pitt" Season 2 finale had everything and a rocking karaoke kicker. Where Robby, Whitaker, Langdon, Mohan and more ended ...

Did an 'ER' star make a cameo in 'The Pitt' season 2 finale?

Wait, was ...