Lady Gaga had her first meeting with Liza Minnelli at Gaga’s concert Tuesday night at MSG. She sent tickets to Minnelli, who joined Gaga backstage for a quick meet-and-greet beforehand. During the show, which was filmed for HBO, Gaga gave Minnelli a shout-out when she told the audience, “I do not lip-synch. I’m not going to waste your time watching some bitch lip-synch her way through an HBO special. Especially not with Liza watching.”