Bey had her hair in a high braid bun, wore a multi-colored frock and cradled her daughter close while shoppers caught the duo from a series of angles on their camera phones, some even snapping Blue's face.
Twitter exploded with pics from excited fans and exclamation mark-laden Tweets about spotting the famous (and reportedly polite and open) duo.
"It's cool," Tweeted one woman. "Just shopping next to Beyonce at Bergdorf, baby on her hip. No entourage. She winked at me."
Beyoncé made headlines earlier this week by releasing a video endorsement to First Lady Michelle Obama.
"Michelle is the ultimate example of a truly strong African-American woman." she read, adding, "She is a caring mother, she's a loving wife, while at the same time she is the First Lady. No matter the pressure, and the stress of being under the microscope, she's humble, loving and sensitive."
For pictures of Blue Ivy's face, click here!