SHREWSBURY, MASS. - A Massachusetts grandmother worried that no one would believe her story of meeting Beyonce before the Grammys — until a picture of her star-struck reaction appeared on the singer's Instagram page .

The picture shows Beyonce and Jay-Z strolling down a hotel hallway past Shrewsbury resident Susan Monaghan, her mouth agape as she stands aside to let the celebrity couple pass.

Beyonce Photo Captures Grandmother's Star-Struck Reaction

Monaghan tells the that all she could think as the singer smiled at her was, "No one is going to believe me."

Beyonce Photo Captures Grandmother's Star-Struck Reaction

Her daughter, Jenn Hiitt, confirms that she was skeptical of the story. But the next day, she got a text saying that Monaghan's picture was circulating online.

Beyonce Photo Captures Grandmother's Star-Struck Reaction

Monaghan says that seeing Beyonce's smile felt like being "hugged by an angel."