Jay-Z and Mary J Blige dropped by New York City's Madison Square Garden for their joint "Heart Of The City" tour.

Beyonce (Mrs. Shawn Carter, just so you know) made a surprise appearance during the show. She did a little bit of her "Uh Oh" dance from her hit, "Crazy in Love" too while her husband stood back and watch...



In related news, Beyonce worked with Chris "Tricky" Stewart and Kuk Harrell in a New York City recording studio for her upcoming third solo effort. (Tricky and The Dream are behind Rihanna's "Umbrella", MJB's "Just Fine" and Mariah Carey's "Touch My Body".)

"She's a professional," Tricky tells PEOPLE. "She loves what she does and works her [butt] off. Right now she's basically doing three to four songs a day and that's unheard of." [PEOPLE.COM]

Labels: Beyonce Knowles, Jay-Z, MJB, Music Hoopla