Ashleigh Johnson, who's like totally a big Jonas Brothers fan, is suing the trio for some reason after being trampled by their groupies at The Grove in L.A.
Johnson claims the incident went down in May 2010, when she was watching the boys perform ... and pummeled by an uncontrolled crowd into a guard fence.
According to legal documents, Ashleigh says she was "agonizingly crushed" into the fence and suffered serious mental, emotional and physical injuries.
Agonizing. Johnson, who does not reveal her age in the suit, seeks damages from the group, plus Caruso Management, the folks behind The Grove.
Fortunately for Nick, Kevin and ... whoever the third Jonas is, they have an air-tight defense: their popularity was already waning by May 2010.