Lady GaGa gave Liza Minnelli and actress Marisa Tomei a special shout out at her New York concert on Tuesday (22Feb11) after spotting the pair in the audience at Madison Square Garden. They weren't the only big names to check out the Paparazzi hitmaker during her U.S. tour - Sir Paul MCCartney was seen dancing along to the flamboyant singer's tracks when she played the same venue on Monday night (21Feb11).