"She came to see the show with Jay Z and she was so awesome. They both came backstage and were so generous with everyone and (had) very specific words to every person in the show... They were really watching. She said to me, 'You were the king... I'm gonna steal your walk!' And the floor opened up and I fell into my grave!" Former Glee star Jonathan Groff was gobsmacked when he recently met his pop idol Beyonce backstage at his Broadway hit Hamilton.