Lady Gaga was honoured to meet Liza Minnelli for the first time after her concert this week at New York's Madison Square Gardens - and gave her a special shout-out during the show.

The Born This Way singer sent the Cabaret star tickets to the show, which was filmed for HBO, and Liza joined her backstage quickly before the show, The New York Post reported.

Lady Gaga made an apparent dig at Britney Spears during her performance, telling the audience: "I do not lip-synch. I'm not going to waste your time watching some b***h lip-synch her way through an HBO special."