Vine Star Jessica Vanessa Twerking -- Just Call Her The Pied Pooper (VIDEO)

Vine star Jessica Vanessa knows how to draw a crowd ... just shake dat ass!!!

Vanessa was at a Vine meet-up in Pan Pacific Park in L.A. Wednesday, where she chatted with our photog ... completely unnoticed by the crowd ... that is, until she decided to show off her infamous twerking skills.

Once the cheeks began to move, the crowd did too ... and before long she was surrounded by a gaggle of fans.

As the old saying goes ... if you shake it, they will come.