The 37-year-old Girls Trip actress and comedienne posted on her Twitter page on Saturday night, two days after Thanksgiving, a selfie of her with the 75-year-old iconic singer and actress standing near a buffet table at a party.
"Just so y'all know I taught my big sister about @CardiB_ today," she wrote.
"Did You teach her a verse too?" asked user @KrazyLov3r.
"Yes," Haddish replied.
Perhaps there will be a musical collaboration between Streisand and the "Bodak Yellow" rapper?
Or a Haddish-Streisand movie?