After causing a storm with her boozy Yankees clubhouse crash, Lady Gaga went all demure as she performed “Someone To Watch Over Me” at Duane Park in TriBeCa. The “Poker Face” singer — who had earlier walked past Yankees security wearing a pinstripe jersey over her bra and bikini bottoms — arrived at the intimate lounge at 12:30 a.m. Saturday in an Alexander McQueen body suit. A spy told us: “She turned up with two security guards, sipped on one drink, had a salad and watched a burlesque performance. But she was there to support her friend, trumpeter Brian Newman, who performed before she got up and wowed the audience.”