*Beyonce made a surprise appearance at her husband Jay-Z's Heart of the City tour stop Friday night at New York's Madison Square Garden.

      In a regular part of the show, the rapper sits in a DJ booth and plays his classic hits to rhyme over, only to cut them all short with a "f**k that s**t." He dismissed his wife's song "Crazy in Love" in the same manner.

      But this time, the song kept playing and Beyonce appeared on stage to the song's familiar booty-shake. Before leaving, she walked over to her husband, swirled and gave him a smile.

      Once she was safely off stage, Jay-Z laughs and says, "That's some bulls**t right there!"